Vegetable dying is a complex and time consuming process, but is done with far less water, and utilizes all natural, plant derived materials. Before fabrics are dyed, they undergo a weight-based scouring, or washing, process, and are then submerged in a alum mordant bath for 24 hours, to encourage the dyes to stick. Some dyes will remain their brilliant, saturated colors for a long time, while others will change with age, sunlight, and wear. We always try to avoid dyes that are known to be fleeting, and stick to the colors that have the most longevity, so your unique design should never vanish. However, please know that with time, the appearance of the dyes will evolve! Bright sunny yellows may shift to yolk-hued golds, amethyst purples to soft stormy blue-greys, and deep jewel-toned pinks to pale strawberry jam.