化学配方数据库
| 配方类型： | INKS AND MARKING COMPOUNDS |
| 配方说明： | Copying-Pencil Lead (U.S. Patent 2,682,476) |
| 配方组成： | Vinyl Acetate/1 Calcium Stearate/23 Methylene Blue/11 Graphite/10 STearic Acid/5 Calcium Chloride/6 Talc/11 Ethyl Cellulose/29 Soot/5 |
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