C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/17
C08J 9/40 (2006.01) B41K 1/34 (2006.01) B41K 1/50 (2006.01) B41N 1/12 (2006.01) C08J 9/26 (2006.01)
Patent
CA 1105213
ABSTRACT OF THE DISCLOSURE A printing material composed of an open-cell sponge rubber capable of including therein a colored ink, which does not necessitate a stamp pad for the stamping operation, is dis- closed. This printing material is prepared by adding appropriate amounts of soluble starch and a fine powder of an easily water- soluble salt which does not decompose or gasify at a curing temperature to a mixture of a starting rubber, a curing agent and a filler, kneading and milling the mixture, introducing the mixture into a mold, heating the mixture to effect curing, re- moving said starch and salt by washing, and drying the resulting product.
290691
Funahashi Takaji
Swabey Ogilvy Renault
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