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