222 IMPROVEMENT IN THE AQtJATINTA PROCESS. 



deem the subject worthy of their reward, I shall feel proud 

 in oommunicatingits process, and flatter myself the arts and 

 artists will feel a peculiar addition and pleasure in its 

 utility. 



Permit me, Sir, 

 to subscribe myself, with all respect. 



Your obedient humble Servant, 



JOHN HASSELL, 



Landscape Draughtsman, ll, Clement's Inn, Strand. 



Process of drawing upon Copper, to imitate Black-lead Pencil 

 or Chalk, 



Method cf A remarkable good polish must be put on the copper with 



drawingori an oil-rubber and crocus raartis well ground in oil; after 

 tate^black-lead which it must be cleaned off with whiting, and then rubbed 

 pencil, or with another clean rag. 



chalk. You are then to pour over your plate the solution to caus6 



ground, which is made as follows;— 



No. 1. — Three ounces of Burgundy pitch. 

 One ditto of frankincense. 



Preparation of These are to be dissolved in a quart of the best rectified 

 the ground, spirit of wine, of the strength to fire gunpowder when the 

 spirit is lighted. 



During the course of twenty-four hours this composition 

 must be repeatedly shaken. Until the whole appears dissolv- 

 ed; then filter it through blotting paper, and it will be fit 

 to use*. 

 Application of I" pouring on this ground, an inclination must be given 

 it. to the plate that the superfluous part of the composition 



may run off at the opposite side,^lhen place a piece of blot- 

 ting paper along this extremity, that it may suck up the 



Grounds. * The ground in hot weather must have an additional one third of spi» 



rit of wine a'lded to it for coarse grounds, to represent chalk; and one 

 half added to it for fine grounds, to represent black lead pencil ; and always 

 to be kept in a cold place in summer, and a moderately warm situation 

 in winter. 



N. B— .If any paits »re not bitten strong enough, the same process is 

 to b» repeated. 



ground 



