This is a 300ml bottle of Maco Black Magic Liquid Emulsion, Variable Contrast from Rollei. This unique developer allows you to print your negatives on just about any surface you can image. Spread it over the surface, expose your negative and there you are. Glass, metal, fabric - you're only limited by your imagination. Using variable contrast filters, a color head or variable contrast enlarger, contrast can be readily controlled.
Note! Use under red safelight conditions only