C44 CALICO-PRIOTING 



whero it passes from one compartment to another, gradually depositing the suspended 

 indigo, which is periodically removed. 



In heavy bodies of colour, tho paste sometimes slips or the shapes become irregular ; 

 this is counteracted by using the first indigo vat raked up instead of clear. Tho vats 

 are used till nearly exhausted, and then the clear liquor pumped off to be used instead 

 of water for setting fresh vats with. 



B. Blue and Yellow, or Orange. Print in one of tho reserve pastes, and yellow or 

 orange colour made as follows : 



No. 71. Chrome-yellow for Machine. 2 gallons water, 20 Ibs. sulphate of copper, 

 20 Ibs. nitrate of lead ; dissolve, and beat up with 12 Ibs. flour, and 2 gallons sulphato- 

 of-lead bottoms ; boil all together. 



The sulphate of lead here is the bye-product in making rod mordant No. 8, and is 

 drained to a thick paste. 



No. 72. Orange. Make a standard liquor by dissolving 24 Ibs. white acetate of 

 lead in 6 gallons water, and stirring 12 Ibs. litharge in it till perfectly white, then let 

 settle, and use the clear. 



For the orange colour take 2 gallons of this standard liquor, instead of the gallons 

 of water in the above yellow colour. 



Follow the same routine in dipping, &c., as for blue and white. After wincing 

 in sulphuric-acid sours, wash well, and wince 10 minutes in bichromate-of-potash 

 solution, 2 oz. per gallon at 100 F. Wash well, and wince in dilute muriatic acid at 

 J- T., conta.ning 1 oz. oxalic acid per gallon, till the yellow is quite bright. The 

 small quantity of chromic acid set free oxidises and destroys the indigo that may be 

 attached to the yellow colour. After this souring, wash and dry. 



If orange was printed instead of yellow, treat as for yellow ; and after the murio- 

 oxalic sour, wash, and raise orange in the following : 10 Ibs. bichromate of potash, 

 300 gallons water, and 3| Ibs. of lime previously slaked to a thin paste, heat to 180 

 F., and wince the pieces in till the orange is full and bright; then take out and wash 

 well, and dry. 



Other varieties of blue dyeing are :? 



c. Two blues. 



D. Two blues and white. 



E. Two blues, white, and yellow or orange. 

 r. Dark blue and green. 



0. Two blues and yellow. 



For c and E a pale hade of blue is first given to the cloth. The light blue Tat is 

 thus composed : 



No. 3. {Light Blue Vat.) 1,000 gallons water, 40 Ibs. indigo, 70 Ibs. copperas, 80 Ibs. 

 lime. Fore. Dip light blue by . three immersions, draining well between; unhook, 

 wince in water, then in sulphuric sours at 2 T. ; wash, squeeze, and dry ; then print 

 on a reserve paste, and proceed as for dark blue and white ; when finished, the pale 

 blue having been protected by the reserve, has remained unaltered, all the rest being 

 dark blue. 



For F. Instead of reserve paste, print on yellow No. 71, and dip dark blue, sour 

 and raise the yellow with bichromate of potash, omit the souring after chroming, and 

 wash and dry. The yellow falling on the pale blue, makes a green. 



For D. On white cloth print an object in muriate of manganese, thickened with 

 dark British gum, raise this as described under the head Bronzes, dry and block in 

 a reserve paste No. 65, then lime and dip in the dark blue vat, letting stay in half an 

 hour, remove, oxidise in the air, wash and sour with dilute muriatic acid to which 

 some jnuriate-of-tin liquor has been added, wash and dry ; -where the peroxide of 

 manganese had been is now dark blue, the ground pale blue with white object. 



For K. Print as D, with yellow or orange in addition, and after the sulphuric 

 sours, raise yellow or orange as before. 



Dip light blue; print reserve paste and yellow; dip dark blue; wince; sour in 

 sulphuric sours at 6 T. ; wince in water; chrome at 140 F. 10 minutes at 2 oz. 

 bichromate per gallon ; wince, wash, and sour in the following : 7 Ibs. oxalic acid, 

 3 Ibs. strong sulphuric acid ; dissolve in water to stand 8 T. ; wince till the yellow 

 is bright ; then wash and dry. 



A style formerly very much in vogue, but now scarcely ever used, is the neutral or 

 lazulite style. It consists in combining mordants with reserves, and dipping blue ; 

 the colours throw off the blue, and are subsequently dyed with madder. 



Neutrals are of two sorts : 



1. Where reds and chocolate, or black, with resist white are printed, and dipped 

 light blue, the resist white being only required to resist the blue. 



2. Where the white is required to cut through the black, reds or chocolate in Addition 

 to the blue, 



