Hydron blue G and R, patented paste 20%% and powder . paratusis carried out as follows: For 140 lbs warps in about 180 gallons liquor the bath is chargedapproximately as follows: Starting bath: Additions for subsequent lots: Hydron Blue G pat. Paste 20% 1=1% lbs 8% lbs Hydron Blue Pv pat. Paste 20% 4 3 Hydrosulphite cone. Powder S „ 5% „ Caustic soda lye of 77° Tw. 8 4 The warps are boiled for about % hour in soft water, and then rinsedonce with cold water. The caustic soda lye is added to the bath first, then the dyestuff, andthen gradually the Hydrosulphite dissolved in cold water. The goods
Hydron blue G and R, patented paste 20%% and powder . paratusis carried out as follows: For 140 lbs warps in about 180 gallons liquor the bath is chargedapproximately as follows: Starting bath: Additions for subsequent lots: Hydron Blue G pat. Paste 20% 1=1% lbs 8% lbs Hydron Blue Pv pat. Paste 20% 4 3 Hydrosulphite cone. Powder S „ 5% „ Caustic soda lye of 77° Tw. 8 4 The warps are boiled for about % hour in soft water, and then rinsedonce with cold water. The caustic soda lye is added to the bath first, then the dyestuff, andthen gradually 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 as possible. Two warm baths are thengiven, which are made to circulate for a few minutes, and the rinsing isfinally completed with cold water. - 35 FABRICS BLEACHED IN THE PIECE. 75 I I Si5 I si V. 76. 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 cone. PowderCaustic soda lye 77° Tw. Starting bath: Additions for subsequent lots: 8 lbs 0% lbs 4 „ 3 6 ... 4 6 „ 3 For No. 78. Starting bath: Additions for subsequent lots: 5 lbs 4 lbs 5 ;; 4 „ 6 ... 4 ., 6 ... 3 Hydron Blue G pat. Paste 20%Hydron Blue R pat. Paste 20%Hydrosulphite cone. PowderCaustic soda lye 77° Tw. Add the lye and the dyestuff to the bath at about 60° C. (140 F.), andgradually stir in the Hydrosulphite previously dissolved in cold water. Allowthe bath to stand for about 5 minutes until the liquor has a yellowish-orangeappearance, then enter the yarn, previously boiled in the customary manner,and dye for about % hour on
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