This SolarFast dye comes in a 4oz bottle featuring the color Brown. SolarFast is an innovative product that uses sunlight activated dyes to create photograms, continuous tone photographs, shadow prints and ombres on fabric and paper. Apply SolarFast dye using a brush, while still damp expose design to sunlight. Create you own patterns by using objects to cast shadows or use a film negative to create permanent photographs. Exposure times vary with each color. SolarFast thins and cleans up with water.