... as ordinary writing inks, prepared from iron and chromium salts and galls. 2. Writing dried by means of blotting paper is naturally more easily removed than writing which is allowed to dry on the surface of the paper; and light writing is somewhat... Quarterly Journal of the Chemical Society of London - Page 756by Chemical Society (Great Britain) - 1888Full view - About this book
| 1903 - 454 pages
...surface of the paper ; and light writing is somewhat more easily removed than coarse and heavy writing. 3. The bleaching solution must be exceedingly dilute,...carefully watched, so as not to be too long continued. Lastly, very old writing which has become brown by age, although it resists the action of weak solutions... | |
| 1909 - 612 pages
...the paper ; and light writing ia somewhat more easily removed than coarse and heavy writing. 3. Tin' bleaching solution must be exceedingly dilute, otherwise...carefully watched, so as not to be too long continued. Lastly, very old writing which has become browu by age, although it resists the action of weak solutions... | |
| United States. Bureau of Standards, Campbell Easter Waters - 1936 - 64 pages
...surface of the paper; and light writing is somewhat more easily removed than coarse and heavy writing. 3. The bleaching solution must be exceedingly dilute,...carefully watched, so as not to be too long continued. Lastly, very old writing which has become brown by age, although it resists the action of weak solutions... | |
| 1940 - 652 pages
...surface of the paper; and light writing is somewhat more easily removed than coarse and heavy writing. 3. The bleaching solution must be exceedingly dilute,...carefully watched, so as not to be too long continued. Lastly, very old writing which has become brown by age, although it resists the action of weak solutions... | |
| 1888 - 480 pages
...with protosalts of iron, becomes more stable (presumably by .equenfly is more or THE WESTERN DRUGGIST. otherwise the action is so rapid and powerful that...carefully watched so as not to be too long continued. Lastly, very old writing which has become brown by age. although it resists the action of weak solutions... | |
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