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Narrator: in the early days
Of the railroad,
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00:00:54,068 --> 00:00:57,689
Train rails were made of either
Cast iron or wrought iron.
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00:00:57,689 --> 00:01:00,724
Cast iron was too brittle
And would break easily.
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00:01:00,724 --> 00:01:04,172
Wrought iron was too soft
And would wear out too quickly.
5
00:01:04,172 --> 00:01:06,655
So steel eventually became
And remained
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00:01:06,655 --> 00:01:09,137
The train-rail metal of choice.
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00:01:13,448 --> 00:01:16,517
The train wheel's rim
Runs on the inside of the rail
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00:01:16,517 --> 00:01:20,172
To keep the train on the track.
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00:01:20,172 --> 00:01:24,068
This plant makes train rails
Entirely out of recycled steel
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00:01:24,068 --> 00:01:26,448
From scrapyards, food cans,
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00:01:26,448 --> 00:01:30,344
And recycled pieces from
The rail-making process itself.
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00:01:33,931 --> 00:01:38,000
Electromagnets pick up the scrap
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00:01:38,000 --> 00:01:40,275
And dump it
In a charging bucket.
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00:01:42,344 --> 00:01:44,620
A truck hauls the bucket inside,
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00:01:44,620 --> 00:01:48,758
Where a crane drops the contents
Into a furnace.
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00:01:48,758 --> 00:01:50,620
An intense electric current
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00:01:50,620 --> 00:01:54,758
Melts the scrap steel
At 3,000 degrees fahrenheit.
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00:01:57,103 --> 00:02:00,034
It then flows into
A large brick-lined ladle,
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00:02:00,034 --> 00:02:03,379
Where they add carbon,
Manganese, and other elements
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00:02:03,379 --> 00:02:05,758
To make the steel more durable.
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00:02:05,758 --> 00:02:09,103
The alloy then runs down
A ceramic tube
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00:02:09,103 --> 00:02:11,724
That shields it
From exposure to oxygen,
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00:02:11,724 --> 00:02:15,000
Which would ruin the metal.
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00:02:15,000 --> 00:02:17,827
From there, the molten metal
Flows into molds,
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00:02:17,827 --> 00:02:20,862
Which extrude it into continuous
Rectangular blocks
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00:02:20,862 --> 00:02:22,689
Called blooms.
27
00:02:25,275 --> 00:02:29,482
Acetylene torches cut each bloom
Into 12-foot lengths.
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00:02:35,862 --> 00:02:38,689
A crane then transfers
The blooms to a furnace,
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00:02:38,689 --> 00:02:41,206
Which, over the next five
To seven hours,
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00:02:41,206 --> 00:02:45,517
Reheats them
To 2,300 degrees fahrenheit.
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00:02:45,517 --> 00:02:48,413
This softens the steel
For further shaping.
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00:02:52,137 --> 00:02:56,655
Then the reheated blooms enter
A machine called a rolling mill,
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00:02:56,655 --> 00:03:01,206
Which elongates each bloom, more
Than quadrupling its length.
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00:03:04,655 --> 00:03:09,103
A shear then slices the longer,
Thinner blooms into four pieces.
35
00:03:20,310 --> 00:03:23,689
The pieces now go into
Another furnace for reheating.
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00:03:23,689 --> 00:03:26,448
This preps them for the next set
Of rolling mills,
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00:03:26,448 --> 00:03:29,827
Which will gradually form them
To the final rail shape.
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00:03:33,103 --> 00:03:36,137
Different railroads used to use
Different-shaped rails,
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00:03:36,137 --> 00:03:38,448
Which required changing
The train's wheels
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00:03:38,448 --> 00:03:41,241
When passing from one railway
To another.
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00:03:41,241 --> 00:03:43,793
By the turn of the 20th century,
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00:03:43,793 --> 00:03:46,448
The t-shaped rail
Became the industry standard
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00:03:46,448 --> 00:03:49,034
And remains so today.
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00:03:52,103 --> 00:03:54,827
For the final shaping,
Each steel rail
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00:03:54,827 --> 00:03:58,413
Passes several times
Through three consecutive mills.
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00:04:03,241 --> 00:04:05,655
This is what a mill's rollers
Look like.
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00:04:05,655 --> 00:04:07,724
And here's the standard
"T" shape
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00:04:07,724 --> 00:04:10,241
To which they form the steel.
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00:04:13,827 --> 00:04:18,827
Next, a saw slices off about 12
Inches to square off the ends.
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00:04:18,827 --> 00:04:21,068
The cut-off pieces go back
To the scrapyard.
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00:04:21,068 --> 00:04:24,620
The rails, meanwhile,
Are laid out
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00:04:24,620 --> 00:04:28,551
Until they cool
To about 930 degrees fahrenheit.
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00:04:28,551 --> 00:04:32,068
Then an electromagnet
Piles them in a holding box,
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00:04:32,068 --> 00:04:33,551
Where they sit for 10 hours
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00:04:33,551 --> 00:04:37,620
Until they cool off
To about 190 degrees fahrenheit.
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00:04:37,620 --> 00:04:39,275
When they come out of the box,
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00:04:39,275 --> 00:04:42,275
They run through
Two sets of rollers.
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00:04:42,275 --> 00:04:45,206
The first set
Flexes the rail vertically.
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00:04:48,827 --> 00:04:50,862
The second, horizontally.
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00:04:50,862 --> 00:04:52,344
This flexing process
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Straightens out the rails,
Which curve slightly
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00:04:55,137 --> 00:04:58,137
Due to all that heating,
Shaping, and cooling.
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00:04:58,137 --> 00:05:01,103
Next, each rail
Passes over a mirror,
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00:05:01,103 --> 00:05:05,413
Enabling inspectors to examine
The bottom, as well as the top.
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00:05:07,896 --> 00:05:09,793
Finally, a saw cuts the rails
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00:05:09,793 --> 00:05:12,344
To whatever size
The railway ordered --
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00:05:12,344 --> 00:05:15,551
Most often the standard length
Of 82 feet.
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00:05:17,965 --> 00:05:20,931
The quality-control department
Measures random samples
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00:05:20,931 --> 00:05:23,896
To make sure
All the dimensions are precise.
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00:05:23,896 --> 00:05:26,137
Every rail bears a number
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00:05:26,137 --> 00:05:29,275
Identifying the batch of steel
From which it came.
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00:05:29,275 --> 00:05:31,724
In the event of a problem,
That number
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00:05:31,724 --> 00:05:35,034
Lets them trace all the rails
Made from the same batch.
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00:05:35,034 --> 00:05:38,931
It's a system that ensures
A safe, smooth ride.
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00:05:51,206 --> 00:05:54,379
Narrator: in regions where
Fresh drinking water is limited,
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Desalination plants
Remove salt from seawater,
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Converting it into freshwater
Suitable for human consumption.
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00:06:01,206 --> 00:06:05,172
There are more than 13,000
Desalination plants worldwide,
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00:06:05,172 --> 00:06:08,482
Producing 12 billion gallons
Of water a day.
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00:06:14,793 --> 00:06:18,275
The desalination plant that
Produced this drinkable water
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00:06:18,275 --> 00:06:21,344
Is located right next
To an electrical power plant
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00:06:21,344 --> 00:06:26,172
Which uses seawater
To cool down its condensers.
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00:06:26,172 --> 00:06:29,034
Post-cooling, the water travels
Via underground pipes
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00:06:29,034 --> 00:06:31,965
To the desalination plant.
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00:06:31,965 --> 00:06:35,551
Before salt extraction,
The water is pretreated
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00:06:35,551 --> 00:06:38,586
In a multiphase
Cleaning process.
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00:06:38,586 --> 00:06:41,103
First, the water flows
Through screens
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00:06:41,103 --> 00:06:43,551
That filter out large debris.
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00:06:47,517 --> 00:06:49,655
From there, it flows into basins
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00:06:49,655 --> 00:06:52,448
For the first
Pretreatment stage.
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00:06:52,448 --> 00:06:55,241
As large paddles
Agitate the water,
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The plant adds two chemicals --
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00:06:57,689 --> 00:07:00,551
Sodium hypochlorite,
A disinfectant,
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00:07:00,551 --> 00:07:03,172
And ferric chloride,
A coagulant.
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00:07:03,172 --> 00:07:05,586
The coagulant
Binds together sand
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00:07:05,586 --> 00:07:08,137
And other tiny particles
Of debris,
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00:07:08,137 --> 00:07:12,379
Forming heavier clumps
That sink to the bottom.
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00:07:12,379 --> 00:07:15,862
This removes a significant
Portion of dirt from the water,
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00:07:15,862 --> 00:07:19,344
But it's still far
From being crystal clear.
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00:07:23,068 --> 00:07:25,586
The water now moves
Into another set of basins
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00:07:25,586 --> 00:07:29,620
For the second pretreatment
Phase -- sand filtering.
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00:07:29,620 --> 00:07:32,827
Inside each sand filter,
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00:07:32,827 --> 00:07:34,965
Regulated by various
Pressure and flow gauges,
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00:07:34,965 --> 00:07:37,000
A steady stream of air
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00:07:37,000 --> 00:07:41,034
Continually moves sand
In a circular motion.
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00:07:44,206 --> 00:07:47,000
The seawater enters
At the bottom of each filter
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00:07:47,000 --> 00:07:48,793
And flows to the top.
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00:07:48,793 --> 00:07:52,206
As the sand moves downward
Against the rising water,
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00:07:52,206 --> 00:07:55,413
The dirt particles
Attach to the sand.
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00:08:03,862 --> 00:08:06,310
The seawater now looks clean
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00:08:06,310 --> 00:08:09,448
But still contains
Microscopic particles.
112
00:08:11,310 --> 00:08:15,241
So it enters the final
Pretreatment phase.
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00:08:15,241 --> 00:08:19,172
This time, the filtering medium
Is diatomaceous earth,
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00:08:19,172 --> 00:08:22,482
A powdered rock
That contains algae fossils.
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00:08:22,482 --> 00:08:27,931
Finer than sand, it filters out
Those microscopic particles.
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00:08:27,931 --> 00:08:30,689
The seawater
Is now perfectly clean
117
00:08:30,689 --> 00:08:34,724
And ready for salt extraction.
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00:08:34,724 --> 00:08:37,379
They do that using membranes --
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00:08:37,379 --> 00:08:40,172
Cylinders containing layers
Of plastic sheets
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00:08:40,172 --> 00:08:44,172
That have pores .001
The diameter of a human hair,
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00:08:44,172 --> 00:08:48,344
Small enough to trap
Microscopic salt crystals.
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00:08:48,344 --> 00:08:50,482
The plant
Pumps the clean saltwater
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00:08:50,482 --> 00:08:54,034
Under extremely high pressure
Through long tubes,
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00:08:54,034 --> 00:08:56,896
Each of which contains
Eight membranes.
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00:08:56,896 --> 00:09:00,068
By the time the water
Passes through all the membranes
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00:09:00,068 --> 00:09:04,275
And reaches the center of the
Tube, it's completely salt-free.
127
00:09:04,275 --> 00:09:07,206
Plant personnel and a slew
Of sophisticated instruments
128
00:09:07,206 --> 00:09:12,724
Continually monitor every one of
The system's 10,000 membranes.
129
00:09:16,172 --> 00:09:20,000
Meanwhile, the plant
Sends the debris removed earlier
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00:09:20,000 --> 00:09:21,620
To large waste basins
131
00:09:21,620 --> 00:09:23,689
For another round
Of chemical treatment.
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00:09:25,344 --> 00:09:27,448
After the solids
Settle to the bottom,
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00:09:27,448 --> 00:09:30,137
The dirty water goes back
To the front of the plant
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00:09:30,137 --> 00:09:32,103
To be cleaned and recycled.
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00:09:44,862 --> 00:09:46,758
Pressure rollers squeeze
The remaining water
136
00:09:46,758 --> 00:09:48,724
Out of the solids.
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00:09:50,379 --> 00:09:53,965
Trucks then transport
The dry solids to a landfill.
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00:09:53,965 --> 00:09:57,793
The extracted salt, meanwhile,
Goes to the power plant,
139
00:09:57,793 --> 00:10:00,931
Which dilutes it,
Then returns it to the sea
140
00:10:00,931 --> 00:10:04,068
In a way that doesn't upset the
Water's natural salinity level.
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00:10:09,448 --> 00:10:11,551
Processing saltwater
Into freshwater
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00:10:11,551 --> 00:10:14,482
Strips away
The water's natural minerals.
143
00:10:14,482 --> 00:10:17,827
Not replacing them
Would create two problems.
144
00:10:17,827 --> 00:10:20,655
First,
The water wouldn't taste right.
145
00:10:20,655 --> 00:10:23,896
Second,
It would damage metal pipes
146
00:10:23,896 --> 00:10:27,068
By aggressively trying
To replace the missing minerals.
147
00:10:27,068 --> 00:10:30,206
Therefore, the plant adds
Liquid lime and carbon dioxide
148
00:10:30,206 --> 00:10:31,620
To the water.
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00:10:31,620 --> 00:10:35,862
These two elements adjust the ph
Level and raise the alkalinity,
150
00:10:35,862 --> 00:10:39,034
Restoring the minerals
And natural taste.
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00:10:50,689 --> 00:10:53,620
Narrator: world war ii veterans
Disabled in combat
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00:10:53,620 --> 00:10:55,965
Were the first to race
In wheelchairs.
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00:10:55,965 --> 00:10:58,344
But those chairs were clunky,
Steel models.
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00:10:58,344 --> 00:11:01,379
Fast-forward to today
And wheelchair racing
155
00:11:01,379 --> 00:11:04,310
Is a serious sport
With aerodynamic chairs.
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00:11:04,310 --> 00:11:07,000
These chairs
Have elongated mainframes
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00:11:07,000 --> 00:11:09,448
And three wheels
Instead of four.
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00:11:12,000 --> 00:11:14,413
This modern racing chair
Is tailored
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00:11:14,413 --> 00:11:17,379
To the athlete's physique,
Specific disability,
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00:11:17,379 --> 00:11:20,241
And skill level.
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00:11:20,241 --> 00:11:23,310
They begin by taking detailed
Measurements of the athlete
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00:11:23,310 --> 00:11:25,448
As she sits in a demo chair.
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00:11:25,448 --> 00:11:28,896
They measure the width
And height of her knees
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00:11:28,896 --> 00:11:31,517
To determine
The best seating position.
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00:11:33,310 --> 00:11:35,034
They check the balance point
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00:11:35,034 --> 00:11:38,310
To decide how the rear-wheel
Axle should be positioned,
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00:11:38,310 --> 00:11:41,931
And they measure her arms so
Push rims can be sized for her.
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00:11:41,931 --> 00:11:44,310
They then produce
A digital drawing
169
00:11:44,310 --> 00:11:45,931
Of the racing wheelchair,
170
00:11:45,931 --> 00:11:49,517
Complete with any extras
Requested by the athlete.
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00:11:54,379 --> 00:11:57,758
The fabricator selects
The appropriate aluminum tubing
172
00:11:57,758 --> 00:12:00,965
And cuts it
To the desired length.
173
00:12:00,965 --> 00:12:05,896
This one will be the main tube
For the racing chair's frame.
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00:12:05,896 --> 00:12:08,206
Rollers curve the tube slightly
At one end
175
00:12:08,206 --> 00:12:11,137
So the framework
Will accommodate the seat.
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00:12:16,724 --> 00:12:19,655
A press then flattens the tube
Quite a bit.
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00:12:19,655 --> 00:12:21,068
This stiffens the metal
178
00:12:21,068 --> 00:12:24,896
And will make the racing-chair
Frame more aerodynamic.
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00:12:24,896 --> 00:12:28,586
This small tube, which they weld
To the main tube,
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00:12:28,586 --> 00:12:31,172
Will hold the racing chair's
Steering fork.
181
00:12:37,344 --> 00:12:39,931
He now tapes a steering
Mechanism for the front wheel
182
00:12:39,931 --> 00:12:41,379
Onto the framework
183
00:12:41,379 --> 00:12:45,413
And confirms that its placement
Is exact before welding.
184
00:12:47,137 --> 00:12:50,000
This device will keep
The front wheel on autopilot,
185
00:12:50,000 --> 00:12:53,586
Freeing the racer's hands
To push the rear wheels.
186
00:12:55,310 --> 00:12:58,551
The welder now positions
The other end of the main tube
187
00:12:58,551 --> 00:13:01,068
Perpendicular to the wheel axle.
188
00:13:03,448 --> 00:13:05,931
He inches the tube
Towards the center of the axle
189
00:13:05,931 --> 00:13:09,275
Until it's right on the mark.
190
00:13:09,275 --> 00:13:11,379
He welds the axle
To the main tube,
191
00:13:11,379 --> 00:13:14,068
Giving the framework
A "T" profile.
192
00:13:17,310 --> 00:13:19,448
Temporary wheels lift the axle
193
00:13:19,448 --> 00:13:23,379
So he can install
The seat frame.
194
00:13:23,379 --> 00:13:26,206
Then a hydraulic machine
Bends an aluminum tube
195
00:13:26,206 --> 00:13:29,896
Into a "U" shape to make
The racing chair's seat frame.
196
00:13:33,034 --> 00:13:36,724
He positions the seat frame
On the rear axle
197
00:13:36,724 --> 00:13:39,000
And does a few more welds.
198
00:13:41,172 --> 00:13:44,689
Finally, he installs fenders
On the wheels.
199
00:13:49,620 --> 00:13:53,310
The main framework of this
Racing wheelchair is complete.
200
00:13:53,310 --> 00:13:57,758
But to make it look flashy,
They spray-paint it red.
201
00:13:57,758 --> 00:13:59,517
This is a powder coating.
202
00:13:59,517 --> 00:14:01,344
It's a thermoplastic paint
203
00:14:01,344 --> 00:14:03,862
That's tougher
Than the conventional kind.
204
00:14:05,965 --> 00:14:08,896
Next, this machine rolls
The push rims,
205
00:14:08,896 --> 00:14:11,793
Which the athlete uses
To propel the wheelchair.
206
00:14:18,241 --> 00:14:21,655
They weld on pegs for attaching
The rims to the wheels,
207
00:14:21,655 --> 00:14:26,000
Then glue a rubber sleeve
Onto each rim.
208
00:14:26,000 --> 00:14:29,275
They wrap it in tape to clamp
The two as the glue dries.
209
00:14:29,275 --> 00:14:30,655
The tape stays on
210
00:14:30,655 --> 00:14:33,310
Until the chair is delivered
To the customer.
211
00:14:34,965 --> 00:14:37,379
They install the rear wheels
At an angle
212
00:14:37,379 --> 00:14:39,862
To make the racing chair
More stable when cornering.
213
00:14:42,655 --> 00:14:46,034
They add padding
For the athlete's knees,
214
00:14:46,034 --> 00:14:49,482
Then assemble the nylon seat
To the chair.
215
00:14:49,482 --> 00:14:53,137
Next comes the front-wheel
Steering fork and handle.
216
00:14:56,620 --> 00:15:00,275
They complete the assembly
With a spring-loaded cylinder.
217
00:15:00,275 --> 00:15:02,896
That's part of
The steering autopilot system.
218
00:15:07,137 --> 00:15:10,758
After testing the steering fork,
They install the front wheel,
219
00:15:10,758 --> 00:15:13,034
Which is smaller
Than the rear two.
220
00:15:18,068 --> 00:15:20,206
Once it's been equipped
With brakes,
221
00:15:20,206 --> 00:15:21,586
This custom racing chair
222
00:15:21,586 --> 00:15:24,965
Is ready to take on
The competition.
223
00:15:24,965 --> 00:15:28,689
An elite athlete will buy
A new racing chair every year.
224
00:15:28,689 --> 00:15:32,379
Some choose rear wheels
Made of lightweight carbon fiber
225
00:15:32,379 --> 00:15:36,620
Because any advantage
Is welcome in the push to win.
226
00:15:50,137 --> 00:15:52,068
Narrator:
Parquetry was invented
227
00:15:52,068 --> 00:15:54,413
In france in the 1600s
As an alternative
228
00:15:54,413 --> 00:15:56,551
To high-maintenance
Marble flooring.
229
00:15:56,551 --> 00:15:58,620
It's made
From small pieces of wood
230
00:15:58,620 --> 00:16:01,103
Bonded together
In a geometric pattern.
231
00:16:01,103 --> 00:16:03,275
The most common motif
Is squares.
232
00:16:03,275 --> 00:16:05,551
But it also comes
In other patterns,
233
00:16:05,551 --> 00:16:09,103
Such as herringbone,
Lozenges, and triangles.
234
00:16:13,793 --> 00:16:16,620
Parquetry can be made
Of laminate or plywood.
235
00:16:16,620 --> 00:16:18,896
However,
The best-quality flooring
236
00:16:18,896 --> 00:16:24,689
Is made from genuine wood, such
As oak, maple, or yellow birch.
237
00:16:24,689 --> 00:16:27,551
The factory first cuts the wood
Into planks,
238
00:16:27,551 --> 00:16:31,620
Measuring 2 to 5 inches wide
By about a yard long.
239
00:16:34,931 --> 00:16:37,241
A drum saw then cuts each plank
240
00:16:37,241 --> 00:16:39,965
Into 6 blocks
About 6 inches long
241
00:16:39,965 --> 00:16:43,275
While an inspector
Discards any misshapen ones.
242
00:16:46,275 --> 00:16:48,724
The blocks then move
Through a planer
243
00:16:48,724 --> 00:16:53,517
That shaves a fine layer
Off both sides.
244
00:16:53,517 --> 00:16:57,068
This reduces the blocks to a
Thickness of just under an inch
245
00:16:57,068 --> 00:17:00,379
And smoothes the top
And bottom surfaces.
246
00:17:00,379 --> 00:17:02,413
Next,
The blocks run through a saw
247
00:17:02,413 --> 00:17:05,275
With 10 blades
That slice them into strips
248
00:17:05,275 --> 00:17:09,034
Measuring .3 inches wide
By 6.2 inches long.
249
00:17:17,344 --> 00:17:19,241
Quality controllers
Remove any strips
250
00:17:19,241 --> 00:17:21,379
With inconsistent thickness,
251
00:17:21,379 --> 00:17:25,758
Which are usually the ones cut
From the block's extremities.
252
00:17:25,758 --> 00:17:28,206
The good strips continue on
To another area,
253
00:17:28,206 --> 00:17:30,172
Where they undergo
A more thorough
254
00:17:30,172 --> 00:17:32,413
Quality-control inspection.
255
00:17:34,241 --> 00:17:37,620
A worker checks
The tops and bottoms,
256
00:17:37,620 --> 00:17:41,241
Then lines them up
On a conveyor belt good-side up.
257
00:17:41,241 --> 00:17:44,241
She also discards
Any substandard strips
258
00:17:44,241 --> 00:17:47,137
That may have slipped past
The first inspection.
259
00:17:50,137 --> 00:17:54,137
The conveyor belt
Then flips the strips over.
260
00:17:54,137 --> 00:17:57,586
This positions the strips
Underside facing upward.
261
00:18:01,896 --> 00:18:05,482
Saws then cut two parallel
Grooves through them.
262
00:18:05,482 --> 00:18:09,034
These grooves are set .9 inches
In from the edge...
263
00:18:13,241 --> 00:18:16,068
...And are just deep enough
To hold a thin aluminum wire
264
00:18:16,068 --> 00:18:19,448
That'll connect strips together
To form tiles.
265
00:18:19,448 --> 00:18:24,068
The next machine
Dispenses the parallel wires.
266
00:18:28,448 --> 00:18:33,482
A wheel pushes the wires deep
Inside their respective grooves.
267
00:18:33,482 --> 00:18:35,206
After every seven strips,
268
00:18:35,206 --> 00:18:38,310
The machine cuts the wires
And starts new ones.
269
00:18:38,310 --> 00:18:43,241
The 7-length strips
Form a 6-inch-square tile.
270
00:18:46,034 --> 00:18:48,862
An end-matching machine
Now squares each tile
271
00:18:48,862 --> 00:18:52,862
So that the four corners
Are precisely 90 degrees.
272
00:18:52,862 --> 00:18:56,758
Then it carves tongues
On two of the tile's edges
273
00:18:56,758 --> 00:18:59,068
And grooves into the other two.
274
00:19:01,413 --> 00:19:05,689
Four tile feeders then drop
Tiles into an assembly machine
275
00:19:05,689 --> 00:19:10,206
That inserts the tongues
Into the grooves.
276
00:19:10,206 --> 00:19:12,482
The machine then applies
Hot glue
277
00:19:12,482 --> 00:19:15,551
Which bonds the four tiles
Into one larger tile
278
00:19:15,551 --> 00:19:18,482
Measuring 12x12 inches.
279
00:19:24,137 --> 00:19:26,793
The tiles are now ready
For varnishing.
280
00:19:26,793 --> 00:19:30,551
Feeders drop them onto
The automated varnishing line.
281
00:19:37,620 --> 00:19:40,827
The tile surface gets a sanding.
282
00:19:48,275 --> 00:19:51,620
Rollers then apply
An even coat of varnish.
283
00:19:51,620 --> 00:19:55,034
From there, the tiles
Immediately pass under
284
00:19:55,034 --> 00:19:56,896
Ultraviolet light.
285
00:19:56,896 --> 00:20:00,620
This dries the varnish
Within a second.
286
00:20:00,620 --> 00:20:03,275
Then the process
Repeats three more times
287
00:20:03,275 --> 00:20:06,551
For a total of four coats
Of varnish.
288
00:20:06,551 --> 00:20:09,137
Workers then stack them in 10s,
289
00:20:09,137 --> 00:20:12,000
At the same time
Doing a final inspection
290
00:20:12,000 --> 00:20:15,896
And discarding any tile that
Has a less-than-perfect finish.
291
00:20:15,896 --> 00:20:18,137
On the packaging line,
292
00:20:18,137 --> 00:20:21,793
Each stack gets a label
And clear plastic wrapping.
293
00:20:23,551 --> 00:20:27,137
An oven shrinks the plastic
Tightly around the tiles.
294
00:20:30,413 --> 00:20:34,103
Those four coats of varnish made
This parquetry superdurable,
295
00:20:34,103 --> 00:20:36,310
And because it's real wood,
296
00:20:36,310 --> 00:20:39,137
When the many years of wear
Do begin to show,
297
00:20:39,137 --> 00:20:43,172
You can simply refinish the
Floor to its original splendor.
298
00:20:43,172 --> 00:20:46,103
--captions by vitac--
Www.Vitac.Com
299
00:20:46,103 --> 00:20:49,068
Captions paid for by
Discovery communications
300
00:20:51,034 --> 00:20:53,586
If you have any comments
About the show,
301
00:20:53,586 --> 00:20:56,896
Or if you'd like to suggest
Topics for future shows,
302
00:20:56,896 --> 00:20:58,310
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