| 摘要 |
The present utility model relates to a composition for black ink for printer cartridge comprising of waste materials such as used motor oil (50ml) and soot (0.05-0.20g). The black ink is produced through the process of filtering the used motor oil for three times, weighing the soot, mixing used motor oil and soot, boiling, filtering the mixture, and installing the resulting ink to the printer cartridge |
