The synthetic dyestuffs and the intermediate products from which they are derived (1920)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872- · London : C. Griffin · leaf 242
e filtering in a technical laboratory is done with theuse of a Buchner porcelain funnel, fitting, by means of a rubber stopper, intoa stout filter-flask with side-tube. This is connected by pump tubing to thefilter-pump, so that a good vacuum is produced in the flask. The filter-paper used is that… … Fig. 10. in the funnel with the pump working, in order that any crevices may be detected,and the paper pressed down round the edge with the finger. If the paper be carefully removed after use, it may be washed with coldwater and used several times. Care is taken always to disconnect the…
Dyes and dyeing
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