Yarns can be dyed by package dyeing or printing. Yarns wound onto spools, cones, or similar units can be dyed, and package dyed yarn can be printed. Package dyed cotton is used for most knitted ...

The best way to check if a product has the dye is to read the label printed on the package. The FDA requires companies to disclose when they use color additives in their ingredients list.

The U.S. Food and Drug Administration (FDA) has published a proposed front-of-package nutrition label, the "Nutrition Info box," that would ...