This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...calcium. 11. Drying on Glass. "Coat glass plates 3 by 4 inches with the oils to be examined, expose to air and light, and note when the film ceases to be tacky. A good oil should dry to an elastic coherent film in three days. Varying conditions of light, temperature, and moisture have such an influence on drying tests ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...calcium. 11. Drying on Glass. "Coat glass plates 3 by 4 inches with the oils to be examined, expose to air and light, and note when the film ceases to be tacky. A good oil should dry to an elastic coherent film in three days. Varying conditions of light, temperature, and moisture have such an influence on drying tests that for comparison of one linseed oil with others all samples must be run at the same time. 12. Drying on Lead Monoxide. "Livache's test calls for precipitated lead, but litharge gives equally good results. Spread about 5 grams of litharge over the flat bottom of an aluminum dish 2.5 inches in diameter and 5/8 inch high; weigh the dish and the litharge; distribute as evenly as possible over the litharge o.5 to o. 7 gram of the oil, weigh exactly, expose to the air and light for ninety-six hours, weigh again, and calculate the gain in weight to percentage based on the original weight of the oil used. 13. Acid Number. "Weigh 1o grams of oil in a 2oo c.c. Erlenmeyer flask, add 5o c.c. of neutral alcohol, connect with a reflux air condenser, and heat on a steam bath for half an hour. Remove from the bath, cool, add phenolphthalein, and titrate the free acid with fifthnormal sodium hydroxide. Calculate as the acid number (milligrams of potassium hydroxide to 1 gram of oil). The acid number varies with the age of the oil, and should be less than 8, though when the oil is refined with sulphuric acid it may show a higher acid number. Test for sulphuric acid. 14. Saponification Number. "Weigh from 2 to 3 grams of oil in a 2oo c.c. Erlenmeyer flask, add 3o c.c. of a half-normal alcoholic solution of potassium hydroxide, connect with a reflux air condenser, heat on a steam bath for an hour, then titrate with half-normal sulphuric aci...
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Add this copy of The Analysis of Paints and Painting Materials to cart. $54.95, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
