No red lantp is really safe if films arc held close to it during development. The film should be developed at a distance of at least three or four feet, the film being taken nearer only now and then for examination. Developed in this way there will be no fog due to light action.
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Otago Witness, Issue 3888, 18 September 1928, Page 10
Word Count
54Untitled Otago Witness, Issue 3888, 18 September 1928, Page 10
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