Easy to refill with snap-in refill cartridge. Instantly creates removable bond for self-sticking and removing. Removable bond is always removable. Simply rub to remove adhesive from surface without tearing paper; nonstaining and leaves no residue. Safe to use on paper, photos, cardstock, etc. Approved Photographic Activity Test (PAT) and is ideal for use with memory albums and other archival materials. Acid-Free