Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1984-07-26
1986-08-05
Niebling, John F.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
101456, 1014631, 204 27, 204 33, 204 383, 204 58, 428469, C25D 1106, B41N 104, B41C 110
Patent
active
046043411
ABSTRACT:
A process is disclosed for the production of bases for offset printing plates in the form of sheets, foils or webs made of roughened aluminum or one of its alloys, which is carried out in an anodic oxidation stage, i.e. in an aqueous electrolyte which contains phosphorus-containing anions. In the procedure, an electrolyte containing dissolved phosphoroxo anions, with the exception of aqueous H.sub.3 PO.sub.4, is employed, and the treatment is carried out for a period of about 1 to 90 seconds, at a voltage between about 10 and 100 volts and at a temperature of about 10.degree. to 80.degree. C. The electrolyte is, in particular, a salt of an oxyacid of phosphorus, such as Na.sub.3 PO.sub.4 or K.sub.3 PO.sub.4. Hydrophilization of the base can be carried out additionally after the anodic oxidation. Also disclosed is a base material produced according to the process and an offset printing plate which includes the base material.
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Galvanotechnik, vol. 66, No. 5, p. 436 (1975).
Hoechst Aktiengesellschaft
Leader William T.
Niebling John F.
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