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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.
In mathematics, a Möbius strip, Möbius band, or Möbius loop [a] is a surface that can be formed by attaching the ends of a strip of paper together with a half-twist. As a mathematical object, it was discovered by Johann Benedict Listing and August Ferdinand Möbius in 1858, but it had already appeared in Roman mosaics from the third century CE .
The Universal Recycling Symbol, here rendered with a black outline and green fill. Both filled and outline versions of the symbol are in use. Outline version. Gary Dean Anderson (born 1947) is an American graphic designer and architect. He is best known as the designer of the recycling symbol, one of the most readily recognizable logos in the ...
Universal recycling symbol outline version with green (#009900) fill. The Möbius loop symbol, originally created by 23-year-old student Gary Anderson, is in the public domain, and is not a trademark. The CCA originally applied for a trademark on the design, but the application was challenged, and the corporation decided to abandon the claim.
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.
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A two-dimensional representation of the Klein bottle immersed in three-dimensional space. In mathematics, the Klein bottle (/ ˈ k l aɪ n /) is an example of a non-orientable surface; that is, informally, a one-sided surface which, if traveled upon, could be followed back to the point of origin while flipping the traveler upside down.