I have been testing my stain experiments for colour fastness. I did two of each staining substance so that I could wash one and leave one as it is and compare. The difference in colour was remarkable. The blackberry stain in the picture has changed colour to a blueish purple. The worst result was the beetroot which completely washed out apart from a very feint stain. In my future experiments I will perhaps try adding salt to help the colour stay.
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