The resinate solution is withdrawn, acidified, and the resin acids collected, dried and weighed. [Please select]
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This is best carried out by converting the rosin into a resinate of soda by boiling it with a solution of either caustic soda or carbonated alkali. [Please select]
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On resting, the coloured liquor rises to the surface of the resinate, and may be siphoned off (or pumped away through a skimmer pipe) and the resinate further washed with water containing a little salt. [Please select]
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