Preservative

Entertainment / Photography / Preservative: Chemical, commonly sodium sulfite, used in developing solutions to prevent rapid oxidation of the reducing agents in use.
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Water-Repellent Preservative

Business / Construction / Water-Repellent Preservative: A liquid applied to wood to give the wood water repellant properties MORE

Dope

Technology / Aviation / Dope: Preservative and pigmented coloring for fabric aircraft covering and paints, generally nitrate lacquer but generically used to denote all early shellac and coal-tar mixtures on up to present-day acryl MORE