Interference 103,685
Date 2/16/90 Project No. Nomex Dyeing Book No. 1664
Product or Process Evaluation of Process and Products
N,N-dibutylformamide and N,N-dimethylbenzamide to test
for effectiveness as Nomex dye assistants-
1 . . . 2 . . .
Wt. Of fabric 12.21 12.23 . . . .
dibutylformamide 4gm . . . .
dimethylbenzamide 4gm
. . . .
Acid blue #62 2%owf 2%owf
Ran 11/2 hrs at 265O F, cooled, dropped baths
#1 very dark blue, complete bath exhaustion
#2 very pale, uniform blue, light to little
exhaustion only
Rinsed all in warm water, left to air dry-
#1 Very exciting for understanding in particular -
seems consistent with growing belief that effective
carrier must show slight water solubility, otherwise
poor distribution ratio/effectiveness - solubility
under use conditions . . .
13.39 12.27 . . . .
% Addn 9.7 0.3 . . . .
. . . . .
Howell Riggins 2/22/90 Penny E. Haith 5/4/90
Page 29 of Riggins Exhibit 22 is dated “2/20/90" at its top
left and signed and dated “Howell Riggins 3/22/90" at its bottom
left. The page was witnessed and dated “Penny E. Haith 5/4/90"
at its bottom right. Page 29 reads in pertinent part (RX 22):
-52-
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