Specalist crafts cyanotype coloured fabric pack these 100 cotton squares have been cyanotype treated making them ready for sun printing place feathers lace acetate drawings or even negative films onto the fabric and expose to strong sunlight for 10 20 minutes then wash out the unexposed cyanotype alternatively when theres no strong sunlight try using a spot lamp comes in five colours yellow green turquoise orange and pink all pieces have been pre shrunk and are non toxic there a