UNITED STATES DEPARTMENT OF AGRICULTURE 



1 BULLETIN No. 



^^jjfeSijally Contribution from the Bureau of Markets and Crop Estimates *> 

 ^GSp^sCriU H. C. TAYLOR, Chief aSVr^"^*^ 



Washington, D. C. PROFESSIONAL PAPER October 20, 1921 



PRELIMINARY MANUFACTURING TESTS OF THE OF- 

 FICIAL COTTON STANDARDS OF THE UNITED STATES 

 FOR COLOR FOR UPLAND TINGED AND STAINED 

 COTTON. 



By W. R. Meadows, Cotton Technologist, and W. G. Blaie, Specialist in Cotton 



Testing. 



CONTENTS. 



Page. 



Grades of cotton, tested 1 



Origin of cotton used 1 



Mechanical conditions 2 



Percentages of waste 3 



Moisture determinations 4 



Page. 



Strength, of yarns 5 



Manufacturing properties 6 



Bleaching properties 6 



Summary 11 



GRADES OF COTTON TESTED. 



The spinning tests 1 herein described were conducted to determine 

 the relative values of the following grades of cotton : 



Low Middling L.M. 



Good Middling Yellow Tinged I- G.M.Y.T. 



Middling Yellow Tinged M.Y.T. 



Low Middling Yellow Tinged L.M.Y.T. 



Good Middling Yellow Stained G.M.Y.S. 



Middling Yellow Stained M.Y.S. 



Good Middling Blue Stained G.M.B.S. 



Middling Blue Stained M.B.S. 



ORIGIN OF COTTON USED. 



The cotton for these tests was purchased by expert cotton classers 

 of the Bureau of Markets for use in the preparation of the Official 

 Cotton Standards of the United States for color for Upland tinged 

 and stained cotton. 



1 This cotton was classed by members of the committee authorized to hear disputes 

 under the provisions of the United States cotton futures act. The spinning tests were 

 conducted iu the textile department of the North Carolina State College of Agriculture 

 and Engineering, under the general direction of W. E. Meadows, cotton technologist, and 

 were made by W. G. Blair, specialist in cotton testing, assisted by C. E. Folk, E. S. Cum- 

 mings, and H. B. Richardson, assistants in cotton testing, and E. F. Upton, formerly 

 assistant in cotton testing. 



55812° — 21 — Bull. 990 1 



