Unlock a new dimension of color in your craft projects with the mordant Copper Sulfate. Known historically as blue vitriol, this versatile mordant acts as a "greening agent," shifting shades towards enchanting greens and blues.  Copper Sulfate not only transforms hues but also enhances light fastness, ensuring your vibrant creations stay brilliant over time. Copper sulfate is used at .5% of the weight of fabric or fibre in your dye bath. Elevate your dyeing and crafting experience with a product trusted by artisans for its outstanding results.