oil process
noun
: a photographic printing process in which a layer of gelatin is sensitized with a bichromate solution, exposed under a negative, soaked in water, and inked with an oily printing ink by a brush, the unexposed portions of the gelatin swelling in the water and repelling the oily ink while the exposed portions tanned by the light action remain unswollen and accept the ink
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“Oil process.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oil%20process. Accessed 23 Nov. 2024.
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