PPG Optical launches non-methanol version of its HI-GARD coating
PPG Optical has announced the launch of a non-methanol version of its HI-GARD hard coating for 1.5 standard ophthalmic lenses, due to the toxicity of methanol. The company says that the new product offers the same scratch-resistant protection for plastic lens materials as existing HI-Gard solutions and that it is ...
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