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[plat-n-oh-tahyp] /ˈplæt n oʊˌtaɪp/

noun, Photography.
a process of printing positives in which a salt is used, rather than the usual silver salts, in order to make a more permanent print.
Also called platinum print. a print made by this process.
an obsolete process for producing photographic prints using paper coated with an emulsion containing platinum salts, the resulting image in platinum black being more permanent and of a richer tone than the usual silver image


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