| 摘要 |
Permanent ink having superior light-and water-durability was composed of distilled water 44-62, glycerin 15-21, ethylene glycol 5, tannic acid 2-4, phenol 1-2, dyestuff 10-15, benzoic acid 3-5, and dextrin 4-6. Thus, glycerin was heated to 100 deg.C for 60-70 min and cooled to 60 deg.C, in which dyestuff and dextrin were mixed and milled for dispersing the dolid materials and then mixed with a mixt. of distilled water, phenol, tannic acid, and benzoic acid and reacted at higher temp. and cooled to give permanent ink. |
