And here are the isometric views:
A list of
10 objects that were made up of other materials in the past but now they are
made up of plastics, and the advantages of this:
1-
Rulers:
in the past, rulers were made up of wood
(but it was too fragile) or metal (but it was too heavy). Now, most of them are
made up of plastics, which is resistant and light-weight.
2-
Toys:
before, they were made up of wood or tin, but these materials were very hard
(so they were dangerous for kids) and also very fragile (so they broke easily).
Now, most of toys are made up of plastics, which are resistant and safe.
3-
Tires:
before, they were made up of metal sheets, but metal sheets didn’t adapt to the
ground and they got rusty. Now, they are made up of plastics. Plastics can
adapt to the ground and they don’t get rusty.
4-
Pens:
before, they were made up by a feather, but it broke easily. Then, they were
made up of metals, but they are too heavy. Now, most of them are made up of
plastics, which are light and resistant, and also cheaper.
5-
Identity
cards: before, they were made up of paper, but paper was very fragile, and it
melts when it gets in contact with water. Now, they are made up of plasticized paper,
which makes them more resistant and waterproof.
6-
Buckets:
before they were made up of wood and metals, but wood is deformed by contact
with water, and metals get rusty. Now, most buckets are made up of plastics,
which are waterproof.
7-
Tweezers:
before, they were made up of wood, but wood is deformed by contact with the
water from the wet clothes, and then it breaks easily. Now, most of them are
made up of plastics, which is waterproof.
8-
Fizzy
drink bottles: before, they were made up of glass, but they were fragile,
dangerous and expensive to manufacture. Now, most of them are made up of
plastics, which is resistant, safe and cheap to manufacture.
9-
Buttons:
before, they were made up of wood, but it is deformed when the shirt was
washed. Now, they are made up of plastics, which are waterproof and resistant.
10-
Table
Games: before, they were made up of wood, but wood brakes easily. Now, most of
them are made up of plastics, which are resistant.
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