MANUFACTURING TESTS OF COTTON 
27 
GRADE 
VALUE 
190 
180 
170 
160 
I 50 
l<+0 
130 
120 
I I 
100 
90 
80 
70 -, 
60 
50 
/ x 
^^" • «^ jf Bleached 
^^^ • ^^^ 
1 
• 
\ 
^^*«».^^ 
•> 
• 
• 
\ 
jT Ble 
ached and M 
ercerized 
• 
• 
\ 
• 
\ 
B ^ 
^ r 
/4 — '" 
Crc 
</ Cloth > 
/> 
ton (Working 
Standards) 
1 
6 5 4 
GRADE NUMBERS 
Fig. 18.— Comparative brightness of cotton and cloth as determined by photometric readings. 
The brightness of the gray cloth of grades 6, 7, 8, and 9 is considerably improved over the 
brightness of the corresponding grades of cotton. The bleached cloth is brighter than the 
mercerized. Grade No. 5, valued as 100, is the base for all photometric readings. Grade No. 1 
(A) is taken from a box of the working standards, whereas grade No. 1 (B) is from a special 
sample of grade No. 1 
