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Suncolor: Ultraviolet-transmissible materials

SUNCOLOR offers products that greatly simplify the curing of pigmented or colored adhesives, coatings and inks.

SUNCOLOR Corp., North Canton, Ohio, offers products that greatly simplify the curing of pigmented or colored adhesives, coatings and inks. These ultraviolet-transmissible materials (UVT), which are marketed under the names UVT SUNSPHERES and UVT SUNSPACERS, allow ultraviolet light to "penetrate" through pigmented formulations and thereby effect through-cure even when coatings are greater than 10 mils (0.010 inches or 254 microns) in thickness. This can be accomplished with photoinitiator concentrations of less than 1% and line speeds greater than 25 fpm. These special-glass, solid spheres are available in various sizes that range from 0.3 to 120 microns in diameter, and are typically used at concentrations of about 20% to 35% by weight.

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