Complete Self Instructing Library of Practical Photography volume 5
Complete Self Instructing Library of Practical Photography volume 5
J B James Boniface Schriever
The book Complete Self Instructing Library of Practical Photography volume 5 was written by author J B James Boniface Schriever Here you can read free online of Complete Self Instructing Library of Practical Photography volume 5 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Complete Self Instructing Library of Practical Photography volume 5 a good or bad book?
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— If the print on the tem- porary support has been cleared in an alum bath in which the alum has not been entirely dissolved, the film of the print will become stained and scratched by the undissolved part of the alum coming in contact with it. The alum bath, in which powder potash alum should be used, should be filtered before use, and must be used cold. 328. Dark Specks on the Print Sometimes Surrounded by Round White Spots. — If the wash waters or any of the developing baths are made up of w...ater containing iron, or small iron particles, small dark specks will be left on the face of the print. These can be picked out when the print is dry, and the print re-spotted. If the water you use from the tap is not clear or free from iron, filter as it comes from the tap. 329. Blisters on the Image. — These are caused by the air in the final support, which has not been properly soaked previous to squeegeeing to the tissue. There will be blisters wherever the air bubbles appear and are not removed.
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