Using a diazo-sensitized emulsion

Q: When using a diazo-sensitized emulsion, how do I know if I have it mixed properly? Answer Use warm distilled water. Warm water dissolves diazo—especially powdered diazo—more effectively than cold water and distilled water eliminates the possibility of impurities that can react emulsion pre-maturely. Stir the emulsion slowly but thoroughly and double check the mixed emulsion…