Start a Self-Ink Stamp Manufacturing Business in Singapore Part One
1. Since deciding on a self-ink stamp template for production, a sketch of the design is photographed, and several copies of the model are transferred to an aluminium frame.
The plate is then immersed in acid, which dissolves the exposed metal and causes the pattern to be engraved or placed above the plate.
2. In the self ink stamp press or vulcanizer, the etched plate (a positive image) is mounted on a sheet of Bakelite, a registered brand of resins and plastics that can be used to make finely detailed molds. The etched plate leaves a negative mold in the resin layer as heated and pressed in the vulcanizer.
The Bakelite mold is then covered with a layer of rubber, and both are heated in a vulcanizer to create the final positive image of rubber. Vulcanizing is a method in which raw or synthetic rubber is heated and pressed to change its strength and chemical consistency.
Vulcanizers were first designed for the rubber tire industry, but they are now used in a variety of applications to treat rubber, plastics, polymers, and other materials.
Vulcanizer operators have their methods for making the best materials, and the time and pressure required to vulcanize a sheet of rubber depends on the size of the mold and the operator's expertise.
A sheet of self-ink stamps is typically exposed to 900 lb (408.6 kg) per square inch of pressure for approximately 3 minutes to complete vulcanization. In the same way, bakelite moulds are vulcanised. The mould or rubber sheet is subsequently withdrawn and cooled.
Stamps produced by some manufacturers are made from photopolymer resin sheets rather than rubber. The resin is added as a solvent to a negative clarity that has been covered by a thin plastic film.
The resin is covered with a backing layer, and the whole sandwich-like plate is loaded into a photorelief printing plate unit.
The computer exposes the negative and the resin to ultraviolet radiation, which causes the image to be transferred. After that, the plate is mounted in a post-exposure unit, which dries the resin. The resin layer is
The sheet of rubber is then treated similarly to a sheet of rubber in the following steps to complete a stamp.