ROLLEI BLACK MAGIC 4 is a purified photo gelatin designed for use with absorbent materials to improve adherence and coating. This is a much cleaner gelatin than used for food and will allow for smaller amounts of emulsion to be coated to any surface - thus increasing the amount of coverage and overall economy.
Example usage: Warm 1000ml distilled water to 158°F-176°F and add 40-80 grams of RBM4 photo gelatine while stirring continuously until completely dissolved. Use 40 grams for non-porous surfaces and 80 grams for cardboard or fabric. To reduce surface tension, add a few drops of wetting agent (with bactericide and fungicide) if required. RBM4 can be used in daylight conditions prior to coating of the emulsion in complete darkness.
Tip: the bottlecap, when fully filled, contains approx. 18 grams of solution and can be used for mixing and dispersion. Please note that RBM4 is a glueing mediator, not a hardener (RBM5).
