A-A-2331A
3.6 Stabilitv. The ink shall not show any coagulation, granulation or precipitation under working or storage conditions. Such evidence of instability shall not be present when the ink is received or after one year of storage under normal conditions.
3.7 Colors (formulas). Inks of all colors (table I) shall be equal to inks prepared according to the following formula:
To prepare 100 mm of ink, dissolve a quantity of dye as indicated in table I for the respected colors, in 50 mm of warm water and add 50 mm of shellac solution (100 grams of wax-free, bleached, white shellac per liter of water). Cool to room temperature and filter.
TABLE I
Drawing Ink Color Control Formulas
|
COLORS |
COLOR INDEX |
GRAINS OF DYE |
|
TRANSPARENT INKS |
||
|
Blue |
C.I. 44095 C.I. Acid Blue 97 |
0.5000 |
|
Brown |
C.I. 30045 C.I. Direct Brown 1 |
0.8000 |
|
Carmine |
C.I. 18070 C.I. Acid Red 40 C.I. 27290 C.I. Acid Red 73 |
0.6400
0.1600 |
|
Green |
C.I. 42100 C.I. Acid Green 9 |
1.2000 |
|
Indigo |
C.I. 42735 C.I. Acid Blue 104 C.I. 20470 C.I. Acid Black 1 C.I. 45380 C.I. Acid Red 87 |
0.7350
0.4350
0.0300 |
|
Orange |
C.I. 16020 C.I. Acid Orange 17 |
0.6000 |
|
Red |
C.I. 45425 C.I. Acid Red 95 |
0.5000 |
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