Some FAQ's from the website:
Why do the different fabric types dye differently?
Basic Dyeing 101 - different fabric contents will take the dye differently - sometimes very differently. Aidas are woven from cotton threads, Linens are made from linen thread, and the Evenweaves that we use are a combination of rayon and cotton.
What are “Crystals”?
This is what we call the fabric that has an opalescent thread woven into it. It gives the fabric sparkle. Sometimes on the dark colors (Mystic) the sparkle can be a bit overwhelming.