The manufacture of alum and the sulphates and other salts of alumina and iron; their uses and applications as mordants in dyeing and calico printing, and their other applications in the arts, manufactures, sanitary engineering, agriculture, and horticulture (1901)
Geschwind, Lucien · London : Scott, Greenwood & son; New York : D. Van Nostrand co. [etc., etc.] · leaf 245
hes three commercial grades of the product : — (1) The ferrous sulphate deposited on the bottom of the crystallising pans is in the form of very small grains, and is known as smalls (fletit-sei), or by the letters PS. The weight per cubic metre (220 galls.) of this grade is about 1050 kilos. (21… … “ ordinary copperas ” ( couperose ordinaire ), or more simply O, and weighs, loose, 900 kilos. (18 cwt.) the cubic metre, or 1050 kilos. (2 1 cwt.) in the heap. (3) The very finely divided salt deposited as sediment in the cooling vats has to be left a very long time to drain, in the course of…
Alum · Sulphates · Dyes and dyeing · Chemistry, Technical
Internet Archive · Harold B. Lee Library · Public domain (published before 1931). Free to use for anything.
