It provides in a kind of aqueous developer, these steps are used to develop the galley of CTP-type aqueous developers, and the image mask layer with excellent dispersibility is in developer solution. Further provided is that a kind of aqueous developer, these steps are used for the galley that the minus of development can develop, and the dispersibility in dross is excellent, even if working as identical developer solution, which is recycled and reused for exploitation mass propgation. The plate developer liquid composition, there is the alkali metal salt of (two) of 12-18 carbon atom and the unsaturated fatty acid of 12-18 carbon atom containing (a) alkali metal salt and fatty acid, wherein (weight ratio): (two) are 20:80 to 80:20. Developer composition can further contain (alkaline reagent of step c), in this case, the composition include 0.(every 100 parts by weight step c) is total (one) and (two), weight ratio (one): (two) are 20:80 to 80:20 to 01-10 parts by weight.
展开▼
