Stable High Ph Developer
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United States of America Patent
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Issued Date -
Aug 23, 2007
app pub date -
Feb 25, 2005
filing date -
Mar 12, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Developer composition obtainable by (a) providing water, (b) dissolving such an amount of an alkaline component selected from alkali silicates, alkali hydroxides, Na.sub.3PO.sub.4, K.sub.3PO.sub.4, NR.sub.4OH, wherein each R is independently selected from C.sub.1C.sub.4 alkyl groups and C.sub.1-C.sub.4 hydroxyalkyl groups, and mixtures thereof in the water provided in step (a) that a pH of more than 12 is obtained, and (c) dissolving a stabilizer selected from M.sub.2CO.sub.3, MHCO.sub.3, or a mixture of 2 or more thereof, wherein each M is independently selected from Li, Na, K and NR'.sub.4 and each R' independently represents H or C.sub.1-C.sub.4 alkyl, in the solution obtained in step (b) wherein the amount of the added stabilizer is such that the amount of the added carbonate anion is 1.5 to 20 wt-%, based on the total weight of the developer composition.
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