Soda soap grease

Mixtures of calcium and sodium soaps give greases that will stand a higher temperature than a straight lime base grease but are not as water resistant as a soda base grease. 

GREASE, SODA BASED - A grease prepared from lubricating oil and sodium soap. 

London Mottled Soap is generally made from melted kitchen stuff, bone grease, cheap tallow, and any inferior fatty matter that will prove serviceable. The leys are ade from crude soda ash, termed black ashy the impurities in which give the mottled or marbled strike," for which this variety of soap is famed. The goods, as the fatty materials are called, are first put into the pan, when the first dose of ley, at sp. gr. 1 050, is run in, after which the fire is made up beneath the pan, and the materials brought to a steady boil. To assist the combination of the tty substances with the ley, a workman constantly... 

The soap was afterwards boiled over a strong salted ley, and the resulting paste mixed, in varying proportions, with other soaps but although the chloride of soda had diminished the peculiar odour of the grease to some extent, it was found that only a small percentage of the fatty acid soap could be worked up with soaps of better quality, and even then a keen nose would recognise its presence. T en... 

For household or laundry purposes he uses by pre-Terence a soap made of oleic acid mixed, with common tallow or animal grease and resin if necessary, he adds a certain proportion of French chalk to give fiimness to the soap. The solution of silicate of soda should have a specific gravity of about 170 by Twaddeil s hydrometer. 

Alkaline Wool Scouring — Alkaline wool scouring may be used in place of neutral scouring. In alkaline scouring, soda ash is added to the wash water and subsequently combines with a portion of the wool grease to form namral soap. This procedure reduces the amount of detergent required and reduces the BOD and the concentration of residual surface-active agents. 

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