Handy man's workshop and laboratory . Fig, 297âHow to knotthe cord HANDY MAN S WORKSHOP AND LABORATORY 355 MENDING A CRACKED BOTTLE A very neat way to mend a piece of cracked glassware withsodium silicate or water-glass came to the writers notice someweeks ago. A cut glass decanter which the owner valued veryhighly had a bad crack running irregularly around the bottomand partly up the side. In addition to preventing its use, it ren-dered it unsightly. To remove all appearance of the crack, the decanter waswarmed slowly and then sealed with its own ground stopper. Thewater-glass was then applie
Handy man's workshop and laboratory . Fig, 297âHow to knotthe cord HANDY MAN S WORKSHOP AND LABORATORY 355 MENDING A CRACKED BOTTLE A very neat way to mend a piece of cracked glassware withsodium silicate or water-glass came to the writers notice someweeks ago. A cut glass decanter which the owner valued veryhighly had a bad crack running irregularly around the bottomand partly up the side. In addition to preventing its use, it ren-dered it unsightly. To remove all appearance of the crack, the decanter waswarmed slowly and then sealed with its own ground stopper. Thewater-glass was then applied with a broad brush on the outside. Fig. 298âMending a cracked bottle of the crack, and as the air cooled inside the external pressureforced it into the crack, which completely disappeared and wasrendered perfectly water tight to cold water at least. Since seeing the above the writer has tried the same operation 356 HANDY MAN S WORKSHOP AND LABORATORY with success on a wide-mouthed jar, but obtained a much bettervacuum and therefore better results without heating the jar. A deep basin was procured, and in the center a candle was ar-ranged, as shown in Fig. 298. The basin was then filled withwater and the cracked jar inverted over the lighted candle; as theair in the jar was consumed by the candle, it was slowly loweredinto the water which effectively sealed it. The water-glass wasthen applied as in the previous operation and the whole left toharden. The water-glass took six to eight hours to set and thenthe outside of the bottle or jar was washed with a cloth dipped inhot water to remove all superfluous water glass,â
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
