616 



CALICO-PRINTING 



and colour-tub ; fig. 370, end elevation of pumps ; fig. 371, side elevation of pumps ; 

 A, lid lever and balance weight ; u, cylinder for holding colour ; c c, piston for sup- 

 porting copper sieves, for the colour to pass through ; D, ram for raising piston ; E, 

 hydraulic cylinder ; r, floor-line ; o o, trough for conducting colour to tub ; H H, 

 paddle for stopping colour whilst changing tabs ; i I, colour tubs ; J, fixing for balance 

 to rest on whilst filling with colour ; K, for fastening down lid ; L, valve for raising 

 and lowering piston ; M, end elevation of pumps, showing safety valve, cistern, and 

 fly-wheel ; w, side elevation, showing cisterns, pumps, fly-wheel, fast and loose pullies, 



and strap guide ; o o, showing the ends of pipes that require connecting together, let 

 the distance be whatever it may between, the pumps and strainer ; P, foundation 

 plate. Where two 'letters together are alike they refer to both sectional view and 

 ground plan. This strainer will strain 80 gallons of thick colour in four minutes, and 

 bo washed out ready for any other sort of colour in six minutes. 



Colours for printing by block are for the most part thickened in the same manner 

 as those for machine, but are much thinner, since very thick colour cannot be applied 

 by block. Some substances also can be used in block printing that are inapplicable 

 to machine, such as pipe-clay and china-clay, which, however finely ground, still 

 contain gritty particles which woxtld speedily scratch and destroy the delicate engraving 

 of the machine rollers. 

 ' A spacious drug-room is attached to the colour-house where all the drugs used are 



