FREE BOOKS

Author's List




PREV.   NEXT  
|<   20   21   22   23   24   25   26   27   28   29   30   31   32   33   34   35   >>  
lphite and 85.1 per cent of the hurd stock. After loading with 14.7 per cent of clay and sizing with 1.28 per cent of resin size, the furnish was given two hours' medium brush, tinted, and run on to the paper machine at 70 feet per minute. Again the Jordan refiner did not seem to reduce the wood shives sufficiently, and it was left "just off." No trouble which could be attributed to the stock was experienced on the paper machine. The color of the resulting paper is due to the use of too little blue in tinting and probably in some measure to the use of too low a percentage of bleach. Run No. 141 was made from the stock of cooks Nos. 308 and 309 in practically the same manner as run No. 140. The stock was washed and brushed one hour, bleached (the record of the amount of bleach was lost), made into a furnish of 14.7 per cent of sulphite and 85.3 per cent of hurd stock, loaded with 14.9 per cent of clay, sized with 1.26 per cent of resin size, given one hour at a medium brush, tinted, and run on to the machine. The Jordan refiner was able to reduce the wood shives to a somewhat greater degree than in previous runs and was held at a medium brush. The stock acted well on the machine and produced a sheet of better quality than any preceding, with the exception of the color, which was due to using too small a quantity of blue. Among the cooks made for run No. 142 are Nos. 312 and 313, in which the concentration of the caustic soda was raised to 113 and 116 grams per liter and the percentage employed was also increased. In spite of these increases the stock from these two cooks did not show any appreciable improvement when dumped from the rotary. Stock from cooks Nos. 310, 311, and 312 was given a medium brush and washing of one hour, bleached with 10.95 per cent of bleach, made into a furnish consisting of 15.2 per cent of sulphite and 84.8 per cent of hurd stock, loaded with 15.2 per cent of clay, sized with 1.28 per cent of resin size, given a medium brush for one hour, tinted, and pumped to the stock chest. Stock from cooks Nos. 313 and 314 was treated in exactly the same manner, except that 11.4 per cent of bleach was used. It was pumped to the stock chest and mixed with the furnished stock from cooks Nos. 310, 311, and 312. A medium Jordan brush was given the stock and it acted well on the paper machine, which was speeded to 75 feet per minute. There seems to be a tendency in the hurd stock to crush a little at the "dan
PREV.   NEXT  
|<   20   21   22   23   24   25   26   27   28   29   30   31   32   33   34   35   >>  



Top keywords:
medium
 
machine
 
bleach
 

tinted

 

Jordan

 
furnish
 
loaded
 

sulphite

 

pumped

 

manner


percentage

 
bleached
 

refiner

 

minute

 
reduce
 

shives

 

caustic

 

concentration

 

employed

 

improvement


appreciable

 

increased

 

raised

 

increases

 

treated

 
furnished
 
speeded
 

tendency

 
washing
 

rotary


dumped

 

consisting

 

brushed

 

tinting

 

resulting

 
attributed
 

experienced

 

measure

 

trouble

 

sizing


loading

 

lphite

 
sufficiently
 

practically

 

produced

 
quality
 
preceding
 

quantity

 

exception

 
previous