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GB540178A
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Process for the production of screen reflex copies by means of a separate covering screen and a separate light sensitive sheet
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US2241104A
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Process and apparatus for the treatment of photographic coatings
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US2199925A
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Method of improving the stability of alkaline solutions of phenolic azo dyestuff components
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US2224360A
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Process of manufacturing washing, cleansing, wetting, and emulsifying agents
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DE721891C
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Process for the preparation of water-soluble sulfonated mixed esters of acids of phosphorus or boron
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US2114468A
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Processes for copying on positive diazotype layers
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US2142265A
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Process of manufacturing crystalline substances
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US2051585A
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Process of making reflex copies
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US2051583A
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Method for making reflex copies
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US2022014A
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Method for making reflex copies
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US2051584A
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Method of making copies with reduced screen structure
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US2026292A
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Copying of opaque originals by contact printing
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GB358814A
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Improvements in or relating to the fixing of images obtained by a negative diazotypeprocess
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GB368853A
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A process for preparing, moistening, emulsifying and equalising preparations for thetextile and leather industries
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GB368812A
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A process for preparing, moistening, emulsifying and equalising preparations for the textile and leather industries
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DE717384C
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Process for the production of sulfonated fatty acids or their derivatives
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GB349527A
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A process for sulphonating higher fatty acids and their derivatives
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GB312283A
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Process for sulphonating higher fatty acids and fatty acid derivatives
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GB293690A
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Processes for sulphonating fatty acids and fatty acid derivatives
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GB123403A
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Improved Process of Preserving Vegetables and Fruits.
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