STABLE HIGH PH DEVELOPER

摘要

Developer composition obtainable by (a) providing water, (b) dissolving such an amount of an alkaline component selected from alkali silicates, alkali hydroxides, Na₃PO₄, K₃PO₄, NR₄OH, wherein each R is independently selected from C₁­C₄ alkyl groups and C₁-C₄ 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 M₂CO₃, MHCO₃, or a mixture of 2 or more thereof, wherein each M is independently selected from Li, Na, K and NR'₄ and each R' independently represents H or C₁-C₄ 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.