this black ink is safe for alcohol markers, watercoloring and pencil crayons. this ink will stain your stamps and any surface it gets on and the "kissing" ink onto your stamp is important to learn. however this ink is multi use, and clings to photopolymer stamps very well and will give you a crisp, very black, great coverage stamped result. very rarely needs 2 layers of ink, and needs to be re-inked every once and a while to keep it in top form.
Kathy Recommended but she does warn about staining on stamps.