Art Metalwork With Inexpensive Equipment for the Public Schools And for the Cra
Art Metalwork With Inexpensive Equipment for the Public Schools And for the Cra
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Be sure also to 56 ART METAL WORK. Paint the back of the fob, remembering that wherever the metal is left bare it will be eaten away by the acid. Now lay aside to dry, which will take from fifteen minutes to two hours, according to the condition of the varnish. The drying of the varnish, however, may be hastened by laying the fob in a warm place. We have now to prepare the acid solution for the real etching in a rather shallow stoneware or glass dish. Mix the solution of one- third nitric acid ...and two-thirds water, and when the varnish on the F\g. 4. Watch-fobs. ETCHING, SOFT SOLDERING. 57 fob is dry, place it in the acid solution. If conditions are right, the acid after a few minutes will commence to etch or eat away the metal that has been left bare. This can be told by the very small bubbles rising from the bare metal. If after five minutes' immersion in the solution the bubbles do not rise, pour in a little more acid. Sometimes it happens that the acid is fresh and strong and will etch too fast.
What to read after Art Metalwork With Inexpensive Equipment for the Public Schools And for the Cra?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Frank Payne to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Be sure also to 56 ART METAL WORK. Paint the back of the fob, remembering that wherever the metal is left bare it will be eaten away by the acid. Now lay aside to dry, which will take from fifteen minutes to two hours, according to the condition of the varnish. The drying of the varnish, however, may be hastened by laying the fob in a warm place. We have now to prepare the acid solution for the real etching in a rather shallow stoneware or glass dish. Mix the solution of one- third nitric acid ...and two-thirds water, and when the varnish on the F\g. 4. Watch-fobs. ETCHING, SOFT SOLDERING. 57 fob is dry, place it in the acid solution. If conditions are right, the acid after a few minutes will commence to etch or eat away the metal that has been left bare. This can be told by the very small bubbles rising from the bare metal. If after five minutes' immersion in the solution the bubbles do not rise, pour in a little more acid. Sometimes it happens that the acid is fresh and strong and will etch too fast.
What to read after Art Metalwork With Inexpensive Equipment for the Public Schools And for the Cra?
You can find similar books in the "Read Also" column, or choose other free books by Arthur Frank Payne to read onlineMoreLess
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