Layerable clear stamps made of photopolymer featuring traditional Japanese family crest designs. Acrylic base sold separately. For best printing results, we recommend using Shachihata stamp pads and TO-MEI HAN Acrylic Base Set Two or TO-MEI HAN Acrylic Base Set Three. The Iromoyo Warabe Mini Stamp Pad is ideal for small stamps and intricate stamp printing. Package Size 96×97×8mm Materials Stamp: Photopolymer Backing: PaperExterior: Polystyrene Storage notes Store your stamps out of direct sunlight. Leaving ink or cleaner on the stamp for an extended period of time can cause it to deteriorate.