Alum

(noun.) a double sulphate of aluminum and potassium that is used as an astringent (among other things).

(noun.) a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum.

(noun.) a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum.

手打:斯蒂芬

• A rough diamond is a hard-looking, luminous object, somewhat like a piece of alum, with a dull skin, called the nyf, over a brilliant body. 佚名. 神奇的知识之书.
• Flour, terra alba, alum, and chalk are the chief ingredients used in the adulteration of cream of tartar. 威廉K.戴维. 智者、化学家和伟大医生的秘密.
• For this reason, many states have prohibited the use of alum in baking powders. 伯莎M.克拉克. 科学通论.
• In this process the skins are steeped in a bath of alum, salt and other substances, and they are also sometimes soaked in fish-oil. 佚名. 神奇的知识之书.
• Among other lining materials found suitable were soapstone, alumina, ammonia, copperas, starch, Epsom salts, and gypsum, paper, pulp, and alum, and a mixture of various other materials. 威廉·亨利·杜利特. 世纪发明.
• For example, with alum and oxalic acid as a mordant and logwood as a dye, blue is obtained; but with a mordant of ferric sulphate and a dye of logwood, blacks and grays result. 伯莎M.克拉克. 科学通论.

整理:纳撒尼尔