144 Journal of the Mitchell Society \^December 



For yarn Nos. 28 s and 36 s. 

 100 gallons water 

 65 lbs. Potato starch. 



For yarn l^o. 281/2. 



100 gallons water 

 • 80 lbs. Famous N Starch. 



For yam 'No. 30. 



100 gallons water 

 65 lbs. Famous N Starch. 



100 gallons water 

 65 lbs. corn starch. 



These formulae for 30 s show how more penetration and 

 hence more weight may be obtained by using a thin boiling 

 starch in place of an untreated starch. 



For yarn No. 36. 



100 gallons water 



. 48 lbs. potato starch. 



For yarn No. 40. 



100 gallons water 

 65 lbs. Eagle Finishing Starch. 



100 gallons water 

 70 lbs. potato starch. 



In comparing the amounts of starch used in the different 

 formulae the viscosity of the different starches should be kept 

 in mind as it will be noted that when large amounts of starch 

 are used the treated or thin boiling starches are used in place 

 of the untreated starch which has a higher viscosity. 



In sizing by the short chain system more starch is required 

 and a thicker solution is used than in sizing by the long chain 

 or slasher system. This is due to the fact that the yarn is not 

 stretched as much in short chain sizing as it is on the slashing 

 machine and hence the starch solution penetrates the yarn more 

 readily. For example, a size mixture composed of 120 gallons 



