IMPROVED COTTON AIRPLANE FABRIC. 
31 
Inches 
1.50 
1. 40 
1.30 
1.20 
1. 10 
1. 00 
•90 
.70 
TIME OF NEUTRALIZATION 
/T 
f 
/ 
' 
/ 
/ 
/ 
/ 
/ 
/ 
/ 
/ 
/ 
/ 
1 
/ 
/ 
/ 
2f 
- 
/ 
j*f 
3f 
/ 
/ 
^ 
Z= 
=== 
No. 1 = Neutralized at once - lbs. Tension 
No. 2 » Neutralized at once - 200 lbs. Tension 
No. 3 - Neutralized at 1 min.- 200 lbs. Tension 
No. 4 * Neutralized at 6 min.- 200 lbs. Tension 
/ 
/ 
^ 
J 
f 
r 
1 

2 

1 

4 

5 
3 
6 
D 
7 
3 
3 
D 
9 
D 
IOC 
.60 
■50 
.40 
.30 
.20 
10 
Fig. 12. — Elasticity curves showing the effect of neutralizing for different 
lengths of time during the mercerizing process. Plain-weave cloth made of 
3/80's gray yarn spun from American Egyptian cotton of grade No. 1 
(fancy), 1| inches in length of staple. 
Twist per inch of single yarn, 33.8. 
Twist per inch of ply yarn, 18.5. 
Construction of cloth, 68 ends by 68 picks. 
Strength of caustic, 64 degrees Twaddle. 
