colorant classification

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  A guide to the pigment Colour Index™: history and practical insights

  by Ioana Maria Cortea — Published on April 20, 2026 — Reading time: 8 min If you’ve ever turned over a paint tube and noticed a small code like PR108, you’ve already encountered the Pigment Colour Index™ (CI)—a system designed to identify what a pigment actually is, beyond its commercial name. The Colour Index™ is the result of over read more