US based Zeal Optics, developed its sun glass frames, using a bio-based plastic made from castor bean oil. Zeal Optics uses castor oil to produce Z-ResinTM, which makes up the foundation of their entire line of frames (as opposed to using crude oil, which is what sunglass frames are traditionally made from).
The company’s bio based lens,is said to be the first lens of its kind that provides an ecological alternative to crude oil based lenses. Currently ZEAL produces all their sunglass frames with Z‐resin, thus eliminating harmful crude oil from the manufacturing process.
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