Die-cut perforations are cut by a metal device to produce perforation-like wavy lines for separating stamps. Self-adhesive stamps are die-cut. Water activated stamps are not and have regular perforations that need to be physically torn to separate the stamps.
Our Customer Service Representatives talk to hundreds of collectors each day. Often, the callers have questions like these. So we’re sharing the answers to these common questions here, hoping you find them helpful.