Procion Tie-Dye Kit

Procion MX is a fiber-reactive dye — it forms a permanent covalent bond with cellulose (cotton, linen, rayon), surviving 100+ washes without fading. RIT (an all-purpose dye) sits on the surface and fades fast. For tie-dye on cotton, procion is the only choice that lasts; RIT is for a one-wash Halloween shirt. Buy procion MX in powder and mix with water and urea.

Soda ash (sodium carbonate) raises the pH to the level where procion dye bonds to the fiber — without it, the dye rinses out. The shirt is soaked in a soda-ash solution, damp-dried, tied, then dyed (the dye bonds over 24 hours at high pH). Soda ash is the activator; it is the difference between a permanent dye and a stain.

The fold and the bind resist the dye (where the fabric is bound, the dye cannot reach) — a spiral (pinch the center and twist), accordion folds (for stripes), bullseye (rubber bands at intervals). The pattern is the fold; the bind is the rubber band or the sinew. Wet-folding (damp fabric folds cleaner) and tight binding (the resist) are the techniques.

The dyed, bound shirt sits 24 hours (in a plastic bag, kept damp and warm) for the dye to fully bond — then a cold rinse (until the water runs clear), a hot wash with detergent (to remove the unbonded dye), and a dry. The 24-hour cure is when the bond forms; rinsing too soon = faded dye. Patience in the cure makes the permanent color.