OCR Secondary Science A5 Colorants

Introduction to the Chemistry of Colorants

Covering pi (Π) electrons, structure of dyes, the chromo[hore, auxochrome and chromogen. The methods of bonding. The classificaiton of dyes by application and chemical type. How structure affects the colour seen, the interaction with fibres and some novel uses for dyes.

Triple dye kit_secondary_scienceA5 OCR

A guide to using the triple dye kit as a laboratory experiment. The kit is available from SDC insert link

Triple dye kit dye structures

Use the above documents to give your students a greater understanding of how a dye generates colour when it interacts with light. How the strucutre affects its ability to colour different fibres and why this is important where textiles are coloured.