1835.] Calico- Printing. 167 



1 J gallon of soft sheep-dung 



4 gallons of a solution of carbonate of soda, of the 



specific gravity 1*06 

 1 gallon of solution of pearl ash, of the spec. grav. 1*04. 

 mixed with a sufficient quantity of cold water to make up 

 22 gallons. The specific gravity of this liquor should be 

 from 1-020 to 1-025. 



This liquor has a milk white appearance, and is, in fact, 

 a kind of imperfect soap. It is put into a large wooden, open, 

 cylindrical vessel called the liquor-tub ; and is kept con- 

 tinually in motion (to prevent subsidence) by wooden levers, 

 driven round in it by machinery. This liquor is conveyed by 

 tin pipes to a kind of trough, in what is called the padding- 

 machine, where the cloth is thoroughly soaked in it. The 

 longer the cloth is allowed to remain impregnated with this 

 liquor the better does it take the dye. Fourteen days is 

 the least period that this impregnation is allowed to remain. 



The sheep dung gives the cloth a green colour, and is 

 found materially to assist the bleaching process to which it 

 is afterwards subjected. It is found to increase the rapidity 

 of the bleaching, especially when the cloth is exposed on 

 the grass between the different operations. 



(4.) In favourable weather the cloth impregnated with 

 the imperfect soap of No. 3, is spread upon the grass to 

 dry. But in rainy weather it is dried in the stove. 



(5.) The cloth thus dried is a second time impregnated 

 with the oleaginous liquid of No. 3. It is then dried again. 



The impregnation and drying processes are repeated a 

 third time. 



(6.) The cloth is steeped in a weak solution of pearlash, 

 of the specific gravity 1-0075 to 1*01, heated to the tempera- 

 ture of 120°. From this liquor it is wrung out and again 

 dried. 



(7.) A mixture is made of the following substances : — 

 1 gallon gallipoli oil 

 3 gallons soda ley, of sp. gr. 1*06 

 1 gallon caustic potash ley, of sp. gr. 1*04, 

 diluted with as much water as will make up the whole to 

 22 gallons. In this liquid it is soaked as it was with that 

 of No. 3. 



The cloth thus impregnated is in fine weather dried on 

 the grass, in rainy weather in the stove. 



