Dissolve half of a small jar of the dye powder in warm water. Lacrosse heads require very little dye: 0.25oz (7 grams) of dye powder per 2 gal (7L) of water. So, that’s half of the small jar. Be sure to read about the vinegar/citric acid below in Step 3 before you start.
Bring dye bath up to a very light boil and keep it at this temperature the entire process (at least 212F or 100C). Don't get it too far above boil or you will melt your lacrosse head and that's no fun.
After a few minutes, slowly add approximately 1.5 cup (355mL) of white vinegar *or* 1 teaspoon of citric acid (sold here) per two gallons of dye bath while stirring. While you can use vinegar, our pro dyers recommend citric acid for all of the non-black/grey colors for the best results. For Jet Black or Silver Grey, vinegar works best.
Add the lacrosse head to dye bath using tongs. (The water is hot, so be careful).
Leave lacrosse head in the dye bath until the desired shade is achieved. It will probably take just a few minutes for a deep color (see table above). Paler colors can be achieved by using less dye, lower temps, less acid, or -- most easy -shorter times in the dye bath.
Carefully remove the lacrosse head from the hot dye bath with tongs. Rinse the plastic in warm water to remove excess dye from the surface.
The dye bath may be saved and reused, or poured down the drain. The dye itself may fall out of solution, but it can be re-dissolved with a little heat.
It's very important that you keep this ratio of water-to-powder. If you use too little or too much water relative to the Single Shot pack, the pH will be off and you will get an undesirable color shift.