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The photographs show industrial testing of dyes. Scrolling over or clicking on the photographs can reveal information or questions about the images, and larger or related photographs.

Click on the chameleon's eyes to see an animation aimed at enhancing the concept underpinning the activity.

Interested in this activity? To find out what the children do, once they have spent 15 minutes using and discussing aspects of the gateway, click on the 'teachers' notes' button in the top right hand corner of the gateway.
You enter each activity via a 'gateway', the interactive element for the children. This gateway introduces the activity 'Quality testing of dyes'.