Amberlith

Indices : Terminology : Amberlith

Amberlith is an orange gel adhered to clear acetate. It was used as a way to knock out or separate areas of camera ready art for different color or screen treatments. The orange film was cut and stripped away with a knife or swivel knife. The orange was clear enough to be seen through for cutting purposes but opaque to light from the lithographic film it was exposed to.

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