Show Why Rosin Rotin in Paper n in n is used In the tIe manufacture of to make snake It water resistant so sot It ii t will be resistant to writing Ink thIs js purpose common rosin Is d with soda a rosin soap being d a which Is a combination of so- so and free rosin sod end which able In water fater This material Is Isto Isto Isto to the paper stock In the form dilate solution In water Alu Alu- sulphate 0 Is li then added to the this precipitating the rosin 1 r finely divided form torm the pr prote pro pre te i consisting of ot a R mixture of WK and free tree resin 1 when shin the paper sheet Is dried a water water film over the pa- pa ben Iber |