142 Journal of the Mitchell Society ^December 



It will be noted from the table of viscosities that Eagle Fin- 

 ishing Starch has a viscosity slightly less than half of that of 

 untreated corn starch and hence when this starch is used the 

 amount can be nearly doubled without effecting the penetration. 



By comparing the following formula for sizing No. 26 yarns 

 with the first formula given it will be seen how the amount of 

 starch may be increased and at the same time obtain greater 

 penetration and more weight than with untreated corn starch. 



100 gallons water 

 80 lbs. Eagle Finishing Starch. 



The following formula for sizing No. 26 yarns shows the 

 use of another treated starch: 

 100 gallons water 



65 lbs. Alkaline N Starch. 



It will be noted from the table of viscosities that this starch 

 has a viscosity of 2.13 or slightly lower than corn starch and 

 hence a larger amount of it can be used. 



In making investigations on the value of the different com- 

 mercial starches for cotton mill purposes the author has re- 

 ceived very valuable assistance from many of the cotton mills in 

 the State. A large number of mills have very kindly sent in 

 reports showing the kind of starch which they use and the 

 method of preparing the starch for sizing and finishing. Below 

 are given a number of typical formulae for sizing by the long 

 chain or slasher system which are in actual use by the mills. 

 For convenience of comparison the formulae have been calcu- 

 lated to a basis of 100 gallons of water. As there is such a great 

 variety of softening agents in general use by the mills the 

 amount of softener has not been included in the formulae. The 

 average amount of softener used in sizing is approximately 15 

 lbs. of tallow, or its equivalent, to 100 lbs. of starch or 1.5 lbs. 

 to each 10 lbs. of starch. The amount used varies, of course, 

 with the yarn numbers and the method of sizing. 



For yarn Nos. 14 s and 20 s. 

 100 gallons water 



66 lbs. Eagle Finishing Starch. 



