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7 OTHER or O "Reserved for manufactured articles produced from any polymer chemistry not described by any other Code". [1] Bottles, plastic lumber applications, headlight lenses, and safety shields/glasses. Number 7 plastics are not typically recycled as they were mostly specialty produced in limited volumes at the time the codes were established.
Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
The U.S. uses a code system, where numbers correspond to certain types of plastic bottles and types of paper. Codes for bottles/ containers are numbers 1-7 and 70-72. These numbers correspond to certain material and chemical composition as seen below. [11]
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The SPI symbols are loosely based on the Möbius loop symbol, but feature simpler bent (rather than folded over) arrows that can be embossed on plastic surfaces without loss of detail. The arrows are formed into a flat, two-dimensional triangle rather than the pseudo-three-dimensional triangle used in the original recycling logo.
There’s no way to stop our planet’s plastic consumption entirely; that genie is already out of the (plastic) bottle, and it will take government and private sector intervention to make a major ...
In mathematics, the plastic ratio is a geometrical proportion close to 53/40.Its true value is the real solution of the equation x 3 = x + 1.. The adjective plastic does not refer to the artificial material, but to the formative and sculptural qualities of this ratio, as in plastic arts.
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