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Glossary: "P" terms

ph Scale
the ph Scale is used to chart acidity and alkalinity, which are terms used to characterize a given substance’s chemical reaction, specifically with regard to hydrogen, when introduced into a solution. Exact levels of acidity or alkalinity are denoted by the pH scale, with values from 1 to 14. The pH levels of the foods we eat affect health insofar as they support or impede the body’s natural chemical processes which maintain good health. In kitchenware, several types of metal used to make pots and pans and tools, particularly aluminum and carbon steel, will react to acidic foods, discolor or even rust. The former is not impervious to discoloration caused by some alkaline foods, as well. Almost all vegetables, most fruits and most dairy foods are alkaline; lemons, tomatoes, wine, coffee, sugar, most grain foods, all meat, poultry, eggs and seafood are acid foods.


A synthetic thermoplastic resin, a linear polymer of carbonic acid, used for molded products, films, and nonbreakable windows.


A strong, vitreous, translucent ceramic material, biscuit-fired at a low temperature, then glazed, then fired at a very high temperature.


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Updated: February 25, 2008

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