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Narrator: today,
On "How it's made,"
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00:00:26,172 --> 00:00:28,000
Orthodontic retainers...
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00:00:32,137 --> 00:00:34,344
...Orange juice...
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00:00:38,241 --> 00:00:40,413
...Retractable saunas...
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...And sawmill
Blade knives.
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--captions by vitac--
Www.Vitac.Com
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Captions paid for by
Discovery communications
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00:00:53,517 --> 00:00:57,275
After spending a fortune on
Braces to straighten your teeth,
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You don't want that
New beautiful smile
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00:00:59,379 --> 00:01:02,965
To shift back to
Its original position.
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00:01:02,965 --> 00:01:05,344
So, orthodontists recommend
Wearing a retainer
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00:01:05,344 --> 00:01:08,172
For several months
After the braces come off,
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00:01:08,172 --> 00:01:09,931
To avoid any shifting.
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00:01:12,862 --> 00:01:15,965
Oftentimes, an orthodontist
Advises their patients
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00:01:15,965 --> 00:01:18,137
To wear a retainer
For about a year
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00:01:18,137 --> 00:01:20,275
After their braces
Are removed.
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00:01:20,275 --> 00:01:23,034
Retainers are custom-made
For each person
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00:01:23,034 --> 00:01:25,517
Using a model
Of the patient's mouth.
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00:01:25,517 --> 00:01:28,724
The orthodontist scans
The patient's teeth and palate,
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00:01:28,724 --> 00:01:31,586
And sends the 3-d images
To a lab.
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A 3-d printer
Builds each model
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00:01:33,758 --> 00:01:37,655
By printing approximately
750 layers of material,
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00:01:37,655 --> 00:01:41,172
Which takes about
4 1/2 hours.
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00:01:41,172 --> 00:01:44,448
The printer prints resin
And a support material.
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00:01:44,448 --> 00:01:47,172
The support material
Prevents the model from shifting
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00:01:47,172 --> 00:01:48,793
During the
Printing process,
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00:01:48,793 --> 00:01:52,827
And provides structural support
For the resin in complex areas.
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00:01:53,896 --> 00:01:56,655
The support material
Is water-soluble.
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00:01:56,655 --> 00:01:58,241
Once a model is printed,
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00:01:58,241 --> 00:02:00,724
They soak it in water
For 10 minutes,
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00:02:00,724 --> 00:02:04,655
Then remove the material
With a pressure washer.
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00:02:04,655 --> 00:02:07,620
A technician places the model
In a vice.
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00:02:07,620 --> 00:02:11,137
Using preformed clasp
Made of stainless-steel wire,
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00:02:11,137 --> 00:02:14,172
She fits the wire
Around the first molar,
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00:02:14,172 --> 00:02:18,965
Bending it with pliers
To fit snugly around the tooth.
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00:02:18,965 --> 00:02:22,206
Then, she bends the end
In a specific shape.
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00:02:22,206 --> 00:02:24,103
This step will help
To anchor the wire
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In the retainer's acrylic palate
At a later time.
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00:02:27,655 --> 00:02:29,724
She clips off
Excess wire,
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00:02:29,724 --> 00:02:33,793
And repeats these steps
For the opposite side.
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00:02:33,793 --> 00:02:36,275
Once both clasps
Are in position,
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The technician secures them
With sticky wax.
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Next, she assembles
The front of the retainer,
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Called the "Labial bow."
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00:02:44,206 --> 00:02:48,172
To do so, she bends a piece
Of wire against a form.
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00:02:48,172 --> 00:02:50,655
Then, she marks
Where to bend the wire
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00:02:50,655 --> 00:02:53,000
To create an adjustment loop
On each side.
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00:02:56,620 --> 00:02:59,896
The labial bow is secured to
The model with wax.
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00:03:02,310 --> 00:03:04,551
Using a pulse welder,
A technician
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00:03:04,551 --> 00:03:08,068
Tacks the labial bow
And the clasps together.
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00:03:10,379 --> 00:03:15,379
He applies flux, a chemical that
Preps an area for soldering.
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00:03:15,379 --> 00:03:18,000
He also applies
A heat-shielding product
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00:03:18,000 --> 00:03:21,827
To prevent the wires
From overheating.
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00:03:21,827 --> 00:03:24,896
Next, the labial bow
Is soldered to the clasps
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00:03:24,896 --> 00:03:29,034
With a silver-based solder
That's safe to wear.
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00:03:29,034 --> 00:03:30,758
He steams off the wax,
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00:03:30,758 --> 00:03:33,724
Removes the finished retainer
Wire from the model,
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00:03:33,724 --> 00:03:36,793
And polishes
The solder joint.
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00:03:36,793 --> 00:03:38,862
The retainer's palate
Is made of acrylic,
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00:03:38,862 --> 00:03:41,620
And comes in
Multiple colors.
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00:03:41,620 --> 00:03:44,793
A technician waxes the wire
Onto the model,
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00:03:44,793 --> 00:03:47,034
Then, applies
The acrylic to the palate,
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00:03:47,034 --> 00:03:49,689
Embedding the ends
Of the wire.
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00:03:49,689 --> 00:03:52,344
The acrylic is made up
Of liquid and powder,
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00:03:52,344 --> 00:03:54,413
Which react when mixed.
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00:03:54,413 --> 00:03:57,517
She applies about three layers
Of each the the palate,
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00:03:57,517 --> 00:03:59,793
Producing an 1/8-inch
Thick mold.
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00:04:02,413 --> 00:04:06,517
The excess acrylic
Is trimmed off with a knife.
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00:04:06,517 --> 00:04:09,137
Then, she the model is placed
Into a pressure cooker
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00:04:09,137 --> 00:04:10,931
For 10 minutes.
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00:04:10,931 --> 00:04:14,000
The pressure removes air bubbles
In the acrylic,
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00:04:14,000 --> 00:04:16,034
While the heat
Speeds up the curing.
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00:04:19,517 --> 00:04:23,068
When the acrylic is ready,
The technician uses a steam gun
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00:04:23,068 --> 00:04:25,793
To melt the wax
Holding the wire to the model.
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She removes the fully formed
Retainer off the model.
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She trims the acrylic
With a grinding wheel
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To smooth out rough areas
And refine the shape.
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00:04:46,034 --> 00:04:49,517
With a hand tool,
She smoothes the entire surface,
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So it won't irritate
The patient's mouth.
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Another technician
Runs the acrylic palate
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Against a muslin-rag wheel
With pumice, a natural abrasive.
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00:05:01,103 --> 00:05:03,206
This makes
The surface glossy.
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00:05:06,517 --> 00:05:09,000
He applies a greaseless
Polishing compound
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To another
Muslin-rag wheel,
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00:05:10,896 --> 00:05:13,517
And polishes the acrylic
To a high shine.
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00:05:20,103 --> 00:05:22,000
Finally,
He drops the retainer
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00:05:22,000 --> 00:05:24,000
Into an ultrasonic
Cleaning machine
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Containing mild acid.
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The combination of acid
And sonic waves
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Removes the pumice
And polish residues.
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Once the retainer has been
Rinsed with water and dried,
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It's placed it in
A storage case.
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Now, it's ready to be shipped
To the orthodontist.
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Narrator:
No one knows who came up with
The idea of squeezing oranges
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To make juice.
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The popularity of orange juice
Increased dramatically
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00:05:59,275 --> 00:06:01,413
In the middle
Of the 20th century,
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00:06:01,413 --> 00:06:04,827
As techniques were developed
To extend its shelf life.
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00:06:04,827 --> 00:06:09,103
Today, many people start their
Day with a tall glass of o.J.
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In its purest form,
Orange juice fresh-squeezed
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And made with no preservatives
Or other additives.
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00:06:18,758 --> 00:06:20,965
The appeal
Is indisputable.
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00:06:20,965 --> 00:06:23,931
Fresh-squeezed o.J.
Contains vitamin c,
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00:06:23,931 --> 00:06:27,068
And the flavor
Is authentic.
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00:06:27,068 --> 00:06:30,448
Orange juice production
Starts in groves.
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The trees take several months
To bear fruit,
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And are harvested
In early november.
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00:06:37,620 --> 00:06:41,275
Picking oranges a job
That's done entirely by hand.
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00:06:41,275 --> 00:06:42,827
An automated picking system
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Could damage
Both the trees and the fruit.
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00:06:47,206 --> 00:06:50,137
The picker uses a bag
Made of vinyl composite
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00:06:50,137 --> 00:06:53,344
That's lightweight
And heavy-duty.
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00:06:53,344 --> 00:06:56,275
There are multiple types
Of juicing oranges.
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This one is called
"The hamlin."
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00:06:59,275 --> 00:07:01,862
Hamlin oranges
Are small and juicy,
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00:07:01,862 --> 00:07:03,896
The trees they grow on
Are productive
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00:07:03,896 --> 00:07:06,103
And resilient to cold.
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00:07:06,103 --> 00:07:08,413
The picker plucks the fruit
From the trees
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00:07:08,413 --> 00:07:10,620
Before they turn orange.
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00:07:10,620 --> 00:07:12,655
They may be green
On the outside,
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00:07:12,655 --> 00:07:15,275
But they are still sweet
On the inside.
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The fruits' size and condition
Are indications
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00:07:18,551 --> 00:07:21,482
Of maturity and flavor.
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00:07:21,482 --> 00:07:24,275
As the picker empties the bag
Into a bin,
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00:07:24,275 --> 00:07:27,068
He examines the oranges.
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00:07:27,068 --> 00:07:28,931
Anything with tears
Or punctures
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00:07:28,931 --> 00:07:31,586
May also have
Internal degradation,
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00:07:31,586 --> 00:07:36,137
But superficial flaws won't
Affect the quality of the juice.
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00:07:36,137 --> 00:07:38,965
The oranges are taken
To a processing facility,
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00:07:38,965 --> 00:07:41,275
And transferred to
A sloped chute.
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00:07:46,068 --> 00:07:49,172
The gradient of the chute
Prevents damage
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00:07:49,172 --> 00:07:51,896
As the oranges tumble
Into a wash station.
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A sprayer rains soapy water
Onto the oranges
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00:07:58,931 --> 00:08:02,068
As spiraling nylon brushes
Scrub and clean,
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00:08:02,068 --> 00:08:04,241
While simultaneously
Moving them forward.
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00:08:07,413 --> 00:08:10,896
After the wash,
Another sprayer rinses them off
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00:08:10,896 --> 00:08:15,758
As the spiraling brushes
Continue scrubbing.
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00:08:15,758 --> 00:08:18,517
The oranges transition to
A roller conveyor
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00:08:18,517 --> 00:08:20,551
That takes them up
And under drying fans.
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00:08:25,724 --> 00:08:29,793
As the oranges exit the dryer,
An inspector checks them
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00:08:29,793 --> 00:08:31,413
For any missed damage.
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00:08:36,931 --> 00:08:40,689
The oranges then travel
Across more revolving brushes.
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00:08:40,689 --> 00:08:42,620
The bristles on these brushes
Are gentler
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00:08:42,620 --> 00:08:44,482
Than on the first group.
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00:08:44,482 --> 00:08:47,655
They buff the skin of the fruit,
And remove any residual dirt.
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00:08:52,000 --> 00:08:56,862
Finally, the oranges fall off
The conveyor line into a bin.
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00:08:56,862 --> 00:08:59,551
Now cleaned,
The oranges can be juiced
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00:08:59,551 --> 00:09:01,000
With no contaminants
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00:09:01,000 --> 00:09:04,137
That could spoil either the
Product or juicing machinery.
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00:09:06,551 --> 00:09:08,137
As a final precaution,
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00:09:08,137 --> 00:09:12,206
The juicing operator
Performs one last inspection.
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00:09:12,206 --> 00:09:14,862
If she's completely satisfied
With their cleanliness
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00:09:14,862 --> 00:09:16,586
And general condition,
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00:09:16,586 --> 00:09:19,034
She loads the oranges
Into the extractor.
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00:09:22,689 --> 00:09:25,758
There's no need to slice them
Beforehand.
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She feeds them to
The juicing machine whole.
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00:09:30,344 --> 00:09:34,551
The system feeds the oranges
One at a time to the extractor.
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00:09:34,551 --> 00:09:36,586
The extractor
Punctures the fruit,
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00:09:36,586 --> 00:09:39,551
And metal teeth
Peel away the skin.
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00:09:39,551 --> 00:09:41,275
It squeezes out the juice
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00:09:41,275 --> 00:09:44,206
While simultaneously
Filtering out the seeds
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And the membrane between
The flesh of the orange
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And the skin.
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00:09:49,655 --> 00:09:51,758
The juice
Flows into a vat.
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00:09:53,758 --> 00:09:55,689
A screen in the vat
Filters the pulp
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00:09:55,689 --> 00:09:58,172
To the desired
Consistency.
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00:09:58,172 --> 00:10:01,448
There are different filters
For different amounts of pulp.
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00:10:04,103 --> 00:10:07,206
The juice is bottled
In jugs.
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00:10:07,206 --> 00:10:09,034
The plastic jugs
Will accommodate
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00:10:09,034 --> 00:10:11,827
Any expansion of
The unpasteurized juice
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00:10:11,827 --> 00:10:13,310
Due to fermentation.
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00:10:19,275 --> 00:10:22,413
Instead of pasteurizing
This fresh-squeezed juice,
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00:10:22,413 --> 00:10:25,206
It is chilled
Immediately.
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00:10:25,206 --> 00:10:27,000
The unpasteurized
Orange juice
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00:10:27,000 --> 00:10:29,172
Won't have
An extended shelf life,
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00:10:29,172 --> 00:10:32,344
But the trade-off is
An unaltered flavor and color.
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00:10:36,517 --> 00:10:39,758
Refrigeration will preserve
The juice for a few days --
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00:10:39,758 --> 00:10:42,448
And after all,
Fresh-squeezed orange juice
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00:10:42,448 --> 00:10:44,931
Is a drink
That's best served cold.
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00:10:56,655 --> 00:10:58,172
Narrator: there's nothing
More relaxing
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00:10:58,172 --> 00:11:00,310
Than sitting in
A hot sauna.
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00:11:00,310 --> 00:11:04,586
Our ancestors figured that out
At least 1,000 years ago.
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00:11:04,586 --> 00:11:08,758
Today, saunas are a substantial
Part of finnish culture,
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00:11:08,758 --> 00:11:10,310
But they also have
A long history
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00:11:10,310 --> 00:11:13,344
In other parts of the world,
Especially in korea.
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00:11:16,655 --> 00:11:18,034
When you live in a city,
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00:11:18,034 --> 00:11:21,206
It's hard to find the space
To fit a sauna.
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00:11:21,206 --> 00:11:24,965
Luckily, this retractable
Indoor sauna solves the problem.
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00:11:27,758 --> 00:11:30,896
The manufacturer
Uses high-strength laminates
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00:11:30,896 --> 00:11:34,344
From sustainably sourced
Wood products.
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00:11:34,344 --> 00:11:36,344
Laminate wood
Is not only strong,
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00:11:36,344 --> 00:11:39,827
It's torsion-resistant,
Which is an important factor
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00:11:39,827 --> 00:11:41,172
When you're
Constructing something
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00:11:41,172 --> 00:11:45,655
That will undergo significant
Shifts in temperature.
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00:11:45,655 --> 00:11:49,689
To cut the laminate,
A craftsman uses a chop saw,
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00:11:49,689 --> 00:11:52,034
Which contains
A computerized system
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00:11:52,034 --> 00:11:54,689
That positions
The fenced tolerances
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00:11:54,689 --> 00:11:57,655
Within a tenth
Of a millimeter.
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00:11:57,655 --> 00:11:59,172
At the next station,
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00:11:59,172 --> 00:12:01,551
The craftsman
Positions the laminate
201
00:12:01,551 --> 00:12:04,896
So that a cnc machine
Can drill end holes
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00:12:04,896 --> 00:12:07,103
Before assembling
A pair of dowels.
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00:12:11,034 --> 00:12:14,241
Meanwhile, another craftsman
Preps several wood components
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00:12:14,241 --> 00:12:16,965
For assembly.
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00:12:16,965 --> 00:12:18,965
After placing them
On an edge,
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00:12:18,965 --> 00:12:23,965
He fills a set of open holes
With high-strength glue.
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00:12:23,965 --> 00:12:25,241
He assembles
The laminate
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00:12:25,241 --> 00:12:27,689
By inserting dowels
Into openings
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00:12:27,689 --> 00:12:30,620
And gently hammering
Everything into position.
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00:12:32,758 --> 00:12:34,931
This part will form
The framework
211
00:12:34,931 --> 00:12:37,827
For one of the highly engineered
Insulated panels.
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00:12:41,724 --> 00:12:44,241
The framework is placed
Into a press
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00:12:44,241 --> 00:12:46,517
That exerts a calibrated
Amount of pressure
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00:12:46,517 --> 00:12:47,965
To every side.
215
00:12:47,965 --> 00:12:50,586
This steps ensures
A solid and durable connection
216
00:12:50,586 --> 00:12:51,862
At all points.
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00:12:54,793 --> 00:12:57,827
This is high-performance
Insulating material.
218
00:12:57,827 --> 00:13:00,137
Thanks to
Specialized engineering,
219
00:13:00,137 --> 00:13:01,896
It insulates
More effectively
220
00:13:01,896 --> 00:13:05,586
Than many other
Sauna materials.
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00:13:05,586 --> 00:13:08,310
This material also
Allows the manufacturer
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00:13:08,310 --> 00:13:13,068
To maintain the sleek design
Of the sauna system.
223
00:13:13,068 --> 00:13:15,241
With the insulation
In place,
224
00:13:15,241 --> 00:13:18,793
A craftsman feeds the panels
Into a precision planer,
225
00:13:18,793 --> 00:13:21,896
To ensure the wood contains
A uniform thickness.
226
00:13:27,068 --> 00:13:29,000
A technician
Begins a process
227
00:13:29,000 --> 00:13:31,689
Called
"Frame-stability construction,"
228
00:13:31,689 --> 00:13:35,137
This method adds a series
Of layers to each panel,
229
00:13:35,137 --> 00:13:38,931
Including exterior sheathing,
Insulation material,
230
00:13:38,931 --> 00:13:42,827
A vapor barrier,
And interior plywood paneling.
231
00:13:42,827 --> 00:13:46,758
These will add up to a thickness
Of only 30 millimeters,
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00:13:46,758 --> 00:13:48,896
Achieving a
High-insulating value
233
00:13:48,896 --> 00:13:51,482
While remaining
Lightweight.
234
00:13:51,482 --> 00:13:55,448
A specialized adhesive is
Applied to attach each layer.
235
00:13:55,448 --> 00:13:58,827
Then, a customized press
Applies heat and pressure
236
00:13:58,827 --> 00:14:03,000
To bond all the layers
Securely together.
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00:14:03,000 --> 00:14:04,862
After a quick
Inspection check,
238
00:14:04,862 --> 00:14:06,482
A technician
Carries the panels
239
00:14:06,482 --> 00:14:08,275
To a cnc
Milling machine,
240
00:14:08,275 --> 00:14:10,310
Where they position it
For trimming.
241
00:14:10,310 --> 00:14:13,482
The cnc machine gauges
The dimensions of the panel,
242
00:14:13,482 --> 00:14:15,689
And runs a bit
Around the perimeter,
243
00:14:15,689 --> 00:14:19,931
Trimming the edges to
A uniform width at high speed.
244
00:14:19,931 --> 00:14:24,586
Once complete, the panels
Advance on conveyor belts.
245
00:14:24,586 --> 00:14:27,172
An automated machine
Uses an adhesive
246
00:14:27,172 --> 00:14:30,034
To add a veneer
To the perimeter
247
00:14:30,034 --> 00:14:33,206
Then, it applies heat
And pressure to secure the bond.
248
00:14:35,758 --> 00:14:38,482
The process is known
As "Zero joints,"
249
00:14:38,482 --> 00:14:42,034
Because it covers up
The panel's visible joinery.
250
00:14:42,034 --> 00:14:44,586
The machine can apply
A range of different veneers,
251
00:14:44,586 --> 00:14:48,758
Depending on
Customers' specifications.
252
00:14:48,758 --> 00:14:52,517
The control panel allows users
To customize the temperature
253
00:14:52,517 --> 00:14:55,310
And duration
Of a sauna session.
254
00:14:55,310 --> 00:14:57,241
Customers can also
Choose from
255
00:14:57,241 --> 00:15:00,482
A variety of
Pre-installed programs.
256
00:15:00,482 --> 00:15:02,758
Two drive buttons
Control the extension
257
00:15:02,758 --> 00:15:05,137
And retraction
Of the sauna.
258
00:15:05,137 --> 00:15:06,896
To extend and retract,
259
00:15:06,896 --> 00:15:10,586
The manufacturer custom-made
This track-wheel system,
260
00:15:10,586 --> 00:15:13,000
The system includes
Durable guides,
261
00:15:13,000 --> 00:15:15,000
Self-lubricating
Components,
262
00:15:15,000 --> 00:15:17,241
And industrial-strength
Ball bearings.
263
00:15:20,206 --> 00:15:23,137
A craftsman carefully joins
The structured wall,
264
00:15:23,137 --> 00:15:26,103
Ceiling, and floor panels.
265
00:15:26,103 --> 00:15:30,413
Thanks to precision machining,
They fit together perfectly,
266
00:15:30,413 --> 00:15:32,413
Making it easy
To assemble the parts
267
00:15:32,413 --> 00:15:34,758
Wherever a customer
Wants their sauna.
268
00:15:36,862 --> 00:15:40,413
Then, the craftsman installs
The heart of the sauna.
269
00:15:40,413 --> 00:15:44,068
The manufacturer has engineered
This compact powerful heater
270
00:15:44,068 --> 00:15:46,103
With a specialized finish
271
00:15:46,103 --> 00:15:49,137
That makes the usual
Safety guard unnecessary.
272
00:15:51,551 --> 00:15:53,241
Retractable saunas --
273
00:15:53,241 --> 00:15:55,965
For the most efficient
Sweat possible.
274
00:16:06,172 --> 00:16:09,344
Narrator: after years of
Carving wood into lumber,
275
00:16:09,344 --> 00:16:13,034
Sawmill blades eventually
Lose their cutting edge.
276
00:16:13,034 --> 00:16:16,310
So, craftsmen are salvaging
The discarded carbon steel,
277
00:16:16,310 --> 00:16:19,965
And making them into knives
For hunting and outdoor use.
278
00:16:19,965 --> 00:16:21,931
When it comes to
Sustainability,
279
00:16:21,931 --> 00:16:24,172
This is a new kind
Of cutting edge.
280
00:16:26,172 --> 00:16:29,344
What was once an old
Sawmill blade is now a sleek,
281
00:16:29,344 --> 00:16:31,206
New brush-cutting knife --
282
00:16:31,206 --> 00:16:33,551
Proof that the future
Doesn't have to be dull
283
00:16:33,551 --> 00:16:35,344
For discarded
Mill blades.
284
00:16:37,793 --> 00:16:40,965
A sawmill blade
Lasts 5 to 10 years.
285
00:16:40,965 --> 00:16:43,241
But when it jagged edges
Wear thin,
286
00:16:43,241 --> 00:16:45,517
It can't cut logs anymore.
287
00:16:45,517 --> 00:16:49,275
Luckily, the carbon steel
Can be salvaged.
288
00:16:49,275 --> 00:16:51,827
A computerized
High-pressure water tool
289
00:16:51,827 --> 00:16:55,206
Cuts into a stack
Of three sawmill blades.
290
00:16:55,206 --> 00:17:00,172
In doing so, it carves out
Numerous knife blade blanks.
291
00:17:00,172 --> 00:17:03,758
The computerized tool also cuts
Holes for the handles
292
00:17:03,758 --> 00:17:07,068
And a tab
For attaching the knife sheath.
293
00:17:07,068 --> 00:17:12,241
Next, the blades are transferred
To a vibratory tumbler.
294
00:17:12,241 --> 00:17:15,655
The tumbler is filled
With triangular ceramic stones
295
00:17:15,655 --> 00:17:18,137
And a soapy solution.
296
00:17:18,137 --> 00:17:20,689
For several hours,
The vibrating stones
297
00:17:20,689 --> 00:17:22,482
Smooth and clean
The blades.
298
00:17:25,137 --> 00:17:28,034
Once complete,
A technician secures the blades
299
00:17:28,034 --> 00:17:29,827
In a fixture
With screws.
300
00:17:32,034 --> 00:17:34,448
The screws hold the blades
Down flat,
301
00:17:34,448 --> 00:17:38,482
And lock them in position
For the next step.
302
00:17:38,482 --> 00:17:41,655
This tool's spiral bit
Carves into the steel
303
00:17:41,655 --> 00:17:46,034
To shave small amounts
From around the edges.
304
00:17:46,034 --> 00:17:48,482
This improves
The shape of the knife
305
00:17:48,482 --> 00:17:50,172
And ensures
That the knife handle
306
00:17:50,172 --> 00:17:52,620
Will fit perfectly
On the tang.
307
00:17:52,620 --> 00:17:54,931
The trimming also
Removes the lines
308
00:17:54,931 --> 00:17:56,655
Left by
The water-jet cutting.
309
00:17:59,172 --> 00:18:01,551
One of the blades is placed
In a fixture
310
00:18:01,551 --> 00:18:02,758
That holds the knife
311
00:18:02,758 --> 00:18:06,068
With the cutting edge
In an upward position.
312
00:18:06,068 --> 00:18:10,448
A technician ignites
An automated torch.
313
00:18:10,448 --> 00:18:15,137
The torch follows the blade,
Exposing it to intense heat.
314
00:18:15,137 --> 00:18:18,689
The torch doesn't touch
The blade's spine.
315
00:18:18,689 --> 00:18:21,655
This selective heat treatment
Hardens only the blade.
316
00:18:28,689 --> 00:18:33,137
An operator places the blade
Into a bucket of quenching oil.
317
00:18:33,137 --> 00:18:36,034
This rapid cooldown
Completes the hardening process.
318
00:18:39,758 --> 00:18:41,620
Next, the cutting edge
Is beveled,
319
00:18:41,620 --> 00:18:45,482
And the entire blade is coated
With a thermoplastic polymer,
320
00:18:45,482 --> 00:18:48,620
Which provides a hard finish
And prevents rust.
321
00:18:51,241 --> 00:18:55,000
Then, the knives are transferred
To a laser-emblazoning chamber.
322
00:18:57,172 --> 00:18:59,758
Another technician
Closes the chamber doors
323
00:18:59,758 --> 00:19:02,517
And activates the laser.
324
00:19:02,517 --> 00:19:05,896
The computerized laser
Etches the company logo,
325
00:19:05,896 --> 00:19:07,275
The knives' model number,
326
00:19:07,275 --> 00:19:10,310
And other information
Into the steel.
327
00:19:10,310 --> 00:19:13,034
At the next station,
A technician moves a blade
328
00:19:13,034 --> 00:19:14,620
Against and abrasive belt
329
00:19:14,620 --> 00:19:18,896
Held in by a special fixture
Along a track.
330
00:19:18,896 --> 00:19:22,137
This angles the blade
Precisely to the abrasive belt
331
00:19:22,137 --> 00:19:25,000
To grind the cutting edge
And complete the bevel.
332
00:19:27,724 --> 00:19:31,379
This brush-cutting blade
Is now almost razor-sharp.
333
00:19:33,724 --> 00:19:35,724
He sharpens
The tip of the knife
334
00:19:35,724 --> 00:19:38,931
By gentling pressing it
Against another abrasive belt.
335
00:19:43,275 --> 00:19:46,931
Next, he applies an abrasive
Compound to a buffing wheel.
336
00:19:49,620 --> 00:19:52,724
He presses the cutting edge
Of the knife against the wheel,
337
00:19:52,724 --> 00:19:55,482
And the abrasive compound
Works its magic,
338
00:19:55,482 --> 00:19:58,241
Honing the edge
To its final sharpness.
339
00:20:00,758 --> 00:20:05,655
He presses threaded fittings
Into the tang of the knife.
340
00:20:05,655 --> 00:20:08,000
He installs them
So that the fittings protrude
341
00:20:08,000 --> 00:20:09,862
From both sides
Of the tang.
342
00:20:13,965 --> 00:20:15,896
The fittings in the tang
Have been spaced
343
00:20:15,896 --> 00:20:18,448
To match holes
In a handle.
344
00:20:18,448 --> 00:20:22,034
This handle is made of
Composite glass and resin.
345
00:20:22,034 --> 00:20:25,448
There are two parts,
One for each side of the tang.
346
00:20:27,862 --> 00:20:29,827
Due to
The precision prep work,
347
00:20:29,827 --> 00:20:32,862
The two parts fit together
Perfectly as one.
348
00:20:35,689 --> 00:20:38,103
Screws hold
The handle parts together.
349
00:20:38,103 --> 00:20:41,551
He dips the tips
In a thread-lock solution.
350
00:20:41,551 --> 00:20:43,758
When the thread-lock
Solution cures,
351
00:20:43,758 --> 00:20:46,862
It stabilizes the screws.
352
00:20:46,862 --> 00:20:49,827
With multiple
Thread-locked screws,
353
00:20:49,827 --> 00:20:54,793
The composite handle
Now has a solid handgrip.
354
00:20:54,793 --> 00:20:56,379
It's taken several hours
355
00:20:56,379 --> 00:20:58,793
To transform
A blunt sawmill blade
356
00:20:58,793 --> 00:21:02,103
Into a sharp
Brush-cutting knife.
357
00:21:02,103 --> 00:21:05,241
Through recycling,
Steel that lost its edge
358
00:21:05,241 --> 00:21:06,689
Now has a new one.
28858
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