http://www.100-gift.com/rss/150/1010/Colored-Key_1.xml Colored Key Wholesale,china Colored Key Suppliers, Manufacturers, Exporters en-us Promotional Gifts Center http://www.100-gift.com/custom_product/150/1010-1/Color-Key-3795.html Color Key is an overlay proof created from the film separations that places each ink color on a separate clear acetate sheet then assembles them together over white paper. Color Key is actually a brandname for a specific process that is often used generically to apply to any overlay proofing system