Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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sodium sulfide

A reddish-yellow compound (NaS), generally prepared by the reduction of sodium sulfate with carbon monoxide or hydrogen. It is soluble in water and is used as a sharpening agent in lime liquors. It forms both sodium hydrosulfide and sodium hydroxide when dissolved in water. Its action is much more caustic than that of SODIUM HYDROSULFIDE . (291 , 363 )

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