Procion MX "cold water dyes" are fixed with Soda Ash instead of with heat, a property which makes them indispensable for backyard dyeing projects, tie dye and batik. Exceptionally permanent on cotton and other plant-based fabrics, the colors are outrageously bright, and they never fade, even with repeated washing. Excellent for: tie dye, batik, immersion dyeing, low water immersion, screen printing, direct application and more. Set includes: 1 lb/0.45 kg Soda Ash dye fixer Procion MX Color Wheel Mixing Chart 4 - 2/3 oz (18.71 kg) jars of Procion MX dye powder in Lemon Yellow, Fuschia, Turquoise, and Jet Black This set comes with enough dye to color approximately 8 lbs (3.6 kg) of dry fabric (even more when tie dying).