Versacolor Ink Pad Base: pigment ink on water base Drying time: takes a bit longer the drying time can be accelerated with a heat tool Heat embossing: you can use this ink for heat embossing To be used on: all types of paper wood silk cotton leather terracotta and unglazed pottery Ink pad: pad made of foam. There are pads in two sizes: 7 6 x 4 6 cm and 2 5 x 2 5 cm. Ink: thick and opaque the pigment remains on the paper Cleaning: with water and possibly a little soap A stamp with this ink can be colored with: water brush and watercolor Acid-free and non-toxic