Some colors, especially reds, may fall out of solution if stock solutions cool; simply reheat them before use. To give you the best advice, are you:
Always use a respirator when handling dry dye powder to avoid inhaling fine particles.
Do not stir wool vigorously while hot to prevent felting. acid dye
If silk loses its sheen, a vinegar rinse can help restore it.
Scour (wash) the fiber thoroughly to remove oil or dirt, then soak in warm water. Some colors, especially reds, may fall out of
Knowing this will help me suggest the best dye-to-fiber ratios. Acid Dye - Jacquard Products
Do not use dyeing pots or utensils for food preparation. If silk loses its sheen, a vinegar rinse can help restore it
(low immersion) or doing a solid color (high immersion)? Dyeing yarn or finished fabric ? Working with wool or nylon ?