Benedikt, Rudolf, 1852-1896, Knecht, Edmund, 1861-1925 · London : G. Bell and Sons · leaf 67
pieces of cloth are generally used, which are all wound or cut to a certain weight, which varies for wool and cotton from 5 to 20 grm., and for silk 2 to 5 grm. The dye-trials are either carried out in beakers (glass or porcelain) or in small vessels of tin or tinned copper, having about the shape… … Fig. 13. be carried out at once, viz., one with the new colouring matter, the other with a colouring matter of known value, which is taken as the " type." It is, however, frequently necessary to compare a larger number of samples with the type. It is absolutely necessary that all trials should be…
Coal-tar colors
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