Concentrate the suspension medium obtained according to method 21.1 by adding extraction mixture C, then pour onto a glass plate. Let the foil dry, remove it from the plate and cut or tear it into small pieces.
CGSB 1-GP-71 METH 60.2-1974 history
1974CGSB 1-GP-71 METH 60.2-1974 Methods of Testing Paints and Pigments Total Rosin Acids Content of Coating Vehicles