GB874725A
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Improvements in or relating to letterpress printing on plastics
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US2312499A
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Planographic printing form
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US2305169A
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Process of producing sensitive silver halide-colloidal aggregates
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US2036945A
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Process for the production of colored pictures, particularly in natural colors on paper, films, and the like
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GB353819A
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An improved process for producing mono- or multi-coloured prints
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GB345311A
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An improved method of imparting printing capability to photographic images in emulsions which are excessively poor in silver
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GB344365A
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Improvements in and relating to processes and apparatus for producing multicoloured prints
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GB333361A
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Process of chemically transforming photographic silver images
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GB334004A
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Process of producing photographs and kinematographic films in natural colours
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GB335930A
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Improvements in or relating to the mordanting of photographic silver images
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GB333697A
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Process of producing films in natural colours by a single exposure
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US1958830A
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Process of producing photographs and cinematographic films in natural colors
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US1758572A
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Process of producing pictures consisting of dyes in photographic manner
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GB245470A
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Process of producing kinematographic pictures in natural colours
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