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A process for the preparation of color value of a correct negative or positive for the direct copying machines process to the pressure plate with the use of photocopiers or pneumatic printing frame by separation of a coloured original in photo - graphischmit grid prepared inks filtered negative
A process for the preparation of color value of a correct negative or positive for the direct copying machines process to the pressure plate with the use of photocopiers or pneumatic printing frame by separation of a coloured original in photo - graphischmit grid prepared inks filtered negative
