Polymer contained in a sachet is now replacing the older cumbersome method of using foam tape to create a dam and pouring of rubber stamp polymers, the sachets have also addressed the age old problem of removing air bubbles from the poured polymer.

The negative of your artwork and polymer sachet is sandwiched between two sheets of glass spaced 2-3mm apart which is then exposed in the machine for a few minutes. Once you have completed the exposure it is a simple process of cutting open the sachet and washing away the excess unexposed polymer before returning the stamp die back to the machine for a 10 minute curing. Once the stamps are cured they can be cut up individually. Polymer sachets are available in a range of sizes up to A4 size.

Processing time is about 30 minutes for a batch of polymer stamps.

Cost of polymer stamp making machines range from $3,500 AUD for an Australian made unit designed specifically for stamp making up to high end imported units with computer controlled washout for $15,000 AUD.

Advantages - Lower capital investment, polymers make almost clear stamps making them ideal for scrapbooking and card making. Stamp relief can be easily controlled during exposure.

Disadvantages - Early polymers did not accept inks as well as polymers available today, this along with being new technology caused initial resistance to polymer stamps.

Summary

Most large stamp manufacturers have a mix of the above equipment. The unmounted rubber stamp dies produced with any of these manufacturing methods can be cut up and affixed to simple hand stamps, dater stamps or self inking stamps. Craft stamps are usually affixed to wooden blocks or in the case of polymer stamps affixed to clear acrylic blocks with adhesives or InstaGrip mounting mat. Various manufactures produces stamp mounts. Astron Industries in Australia manufacturer the clear hand stamp 'Vuestamp' and also distribute the Ideal range of self inking mounts. Other brands of self inking mounts are Trodat, Colop and Shiny.