water glass

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water glass

water glass or soluble glass, colorless, transparent, glasslike substance available commercially as a powder or as a transparent, viscous solution in water. Chemically it is sodium silicate , potassium silicate, or a mixture of these. It is prepared by fusing sodium or potassium carbonate with sand or by heating sodium or potassium hydroxide with sand under pressure. Water glass is very soluble in water, but the glassy solid dissolves slowly, even in boiling water. Water glass has adhesive properties and is fire resistant. It is used as a detergent; as a cement for glass, pottery, and stoneware; for fireproofing paper, wood, cement, and other substances; for fixing pigments in paintings and cloth printing; and for preserving eggs (it fills the pores in the eggshell, preventing entrance of air).

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water-glass

A Dictionary of Food and Nutrition | 2005 | | Â© A Dictionary of Food and Nutrition 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

water‐glass Sodium silicate; used at one time to preserve eggs, by forming a layer of insoluble calcium silicate around the shell, and so sealing the pores.

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DAVID A. BENDER. "water‐glass." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 19 Dec. 2009 <http://www.encyclopedia.com>.

DAVID A. BENDER. "water‐glass." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (December 19, 2009). http://www.encyclopedia.com/doc/1O39-waterglass.html

DAVID A. BENDER. "water‐glass." A Dictionary of Food and Nutrition. 2005. Retrieved December 19, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-waterglass.html

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A Dictionary of Chemistry | 2004 | Â© A Dictionary of Chemistry 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

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	Glass water bowl and sun start fire at Wash. home News Wire article from: AP Online; 5/19/2009
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