Hydron blue G and R, patented paste 20% and powder (1911)
Cassella Color Company · New York · leaf 52
lly the Hydrosulphite dissolved in cold water. The goods arethen dyed for about an hour at 50—60<> C. (120—1400 F.). After dyeing, the liquor is immediately removed by means of a pumpand the warp freed from excess of liquor by vacuum, this operation beingcarried out as quickly and effectively… … XIV FABRICS COMPOSED OF DYED AND BLEACHED YARN. The dyebaths for the Blues shown in Nos. 77 and 78 are charged per90 lbs unbleached cotton yarn and approx. 180 gallons liquor in the vat asfollows (see also page 3): For No. 77. Hydron Blue G pat. Paste 20%Hydron Blue R pat. Paste 20%Hydrosulphite…
Dyes and dyeing
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