altClariant Masterbatches (Holden, MA) offers color concentrates and pre-color compounds that serve as the basis for new colors for TOPAS cyclic olefin co - poly mer (COC), a material used for medical devices. New colors for TOPAS COC polymers were developed to work with the inherent transparency of the material. No dyes are used, eliminating the risk of color migrating to the surface of molded products.

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