| 摘要 |
PURPOSE:To obtain always uniform finished printed matters with a small amt. of developing soln. by adding a surface active agent which regulates the surface tension of a developing soln. to below a fixed value to the developing soln. CONSTITUTION:A surface active agent is added to a developing soln. with the purpose to regulate the surface tension of the developing soln. to <=50dyne/ cm at 25 deg.C. Any surface active agents which reduce the surface tension of the developing soln. to <=50dyne/cm at 25 deg.C may be used, but it is preferred that such surface active agents reducing the surface tension by the addn. of small amt. of the agents and influencing scarcely on the developability are preferred. For this purpose, a kind of anionic surface active agent such as sodium alkyl diphenylether disulfonate, sodium alkyl sulfonate, etc. may be used, but F-contg. surface active agents having perfluoroalkyl group in the molecule, namely, nonionic surface active agents such as perfluoroalkyl carboxylate, perfluoroalkyl sulfonate, etc. are most preferred. |
