The classic pads are dye ink and the craft are pigment inks. The craft pads are good for heat embossing and great for scrapbooking because they are archival safe, acid free, and fade-resistant. They are very wet and take a while to dry, unless you use a heat tool to set them. They color stays on top of the paper, rather than soaking into it like the classic pads. The classic pads are great for watercoloring. I hope that helps. I have all 48 in both the classic and craft and I love them all
Cathy Marie