Method for the manufacture of a gelatin containing recording material

摘要

In a method for the manufacture of a recording material containing a coated and dried gelatin-containing layer on a support, the use of an aqueous coating composition containing : (1) hydrophilic colloid matter consisting for at least 90 % by weight of gelatin, (2) no thickening agent(s) increasing the viscosity of said composition or containing no more than 5 % by weight of such thickening agent(s) with respect to the total gelatin content of said composition, (3) a hardening agent for gelatin that reduces its water-solubility after coating, characterized in that said gelatin is a gelatin species whereof a 10 % by weight aqueous solution at 36 DEG C and pH 6 has a viscosity of at least 35 mPa.s at a shear rate of 1000 s<-><1> and shows a decrease in viscosity by at least 10 mPa.s at a shear rate of 40,000 s<-><1>, and said gelatin species has a solidification time of less than 20 seconds and consistency characteristic corresponding with a viscosity of more than 500 mPa.s determined on a 3 %wt solution of said gelatin in water at pH = 6 after cooling for 30 seconds at a shearing rate of 208 s<-><1> proceeding under the test conditions of Test S described herein. f