METHOD OF MANUFACTURING STAMP FORM PLATE, AND STAMP

摘要

The invention provides a method of manufacturing a stamp form plate, which comprises a sponge material having open cells and enables repeated sealings without replenishing a stamp ink for many hours, and a stamp. The method of manufacturing a stamp form plate according to the invention comprises the steps of superposing a heating plate, which includes a heating material, or a heat melting ink sheet, on a surface of a stamp material having open cells, infiltrating a manuscript, in which characters and figures are represented by desired portions where any recording material is not existent and desired portions where a recording material is existent, with a liquid substance, superposing the manuscript on the heating plate or the heat melting ink sheet so as to cause an image having an imprint of a seal on the manuscript to produce a mirror image, and applying a light onto the manuscript so as to cause a light transmitted through the portions, where any recording material is not existent, to raise a temperature of the heating material at locations corresponding to the portions, where any recording material is not existent, so that the heating material corresponding to the portions where any recording material is not existent is heated to melt the surface of the stamp material or a heat melting ink in the heat melting ink sheet melts to permeate into an outer layer of the stamp material, so that the portions where any recording material is not existent make portions where a stamp ink does not percolate while a surface of the stamp material corresponding to the portions where a recording material is existent does not melt and makes portions where a stamp ink percolates.