These concentrated liquid dyes can be used directly from the bottle or diluted with up to four parts water to achieve a lighter color. Ideal for watercolor paintings and tinting and dyeing craft materials such as scrapbook paper, papier-mâché, glue, sand and clay. Dye based, some colors may fade. Washes out of most fabrics with soap and hot water. Water based and Certified AP Non-Toxic. Each set includes six 8 ounce bottles, 1 each of Yellow, Orange, Red, Blue, Green and Violet.