340 PAPER MAKING. 



The water is now drawn off by means of pipes, and (he pulp 

 conveyed to the mill, whore it is to be coarsely ground for one 

 hour ; at the expiration of which it is boiled in a cauldron for a 

 similar space, with a sufficient quantity of water to rise four or five 

 inches above it. A short time before the mixture begins to boil, 

 thirteen quarts of caustic ley of potash are to be added to every 

 cwt. of paper. The ley alluded to is prepared by dissolving lOOlbs. 

 of potash in 300 quarts of boiling water, to which are to be added 

 20 Ibs. of pulverized quick-lime ; and the whole must be briskly 

 agitated, till it become of an uniform consistence, when it is suf- 

 fered to stand for 12 hours; at the end of this time it must be drawn 

 off, and 75 quarts of boiling water added to the sediment, which 

 being stirred for half an hour, and suffered to stand till it become 

 clear, is to be mixed with the liquor first decanted. 



When the paste has boiled in this ley for one hour, the fire is to 

 be extinguished, and the matter suffered to macerate for 12 hours ; 

 after which it must be taken out, drained, put into bags, and sub. 

 mitted to the action of a strong press for a similar length of time, 

 to deprive it of all moisture ; and, if it appear white, so that the 

 printer's ink be properly extracted, it may be re-manufactured in 

 the usual manner. 



II. Process for the re-fabrication of written paper. The 

 paper must be sorted; the yellow edges cutoff; and the whole 

 thrown, leaf by leaf, into a tub half full of boiling water, where it 

 is to be agitated as before directed. After it has macerated four 

 hours, the water should be drawn off; a fresh quantity of boiling 

 water added ; and the mixture stirred for half an hour : at the ex. 

 piration of which the paper is again left to dissolve for throe hours. 



The fluid is now drawn off, and 260 quarts of cold water poured 

 on each cwt. of paper ; which being perfectly mixed, 6 Ibs. of oil of 

 Titriol are to be gradually added ; and the whole strongly agitated 

 for a considerable time, that the paper may thoroughly imbibe the 

 liquor. 



This composition is next suffered to macerate for twelve hours ; 

 the agitation being occasionally repeated, when the tub is to be filled 

 up with cold water ; and the mixture again stirred, to wash the 

 paper, uhich will now be reduced to a perfect paste. Lastly, after 

 drawing off the water, the pulp must be put into bags, pressed, and 

 ground in a mill ; after which it is conveyed to the tat, and work- 

 ed in the manner practised with linen rags. 



