Production Of Pen Ink From Pulverized Charcoal
Pulverized charcoal and used cooking oil can be feasible alternative materials in pen ink production. The addition of vinegar and cornstarch would result to a more desired ink in terms of color intensity, consistency, etc. PRODUCTION OF PEN INK FROM PULVERIZED CHARCOAL AND USED COOKING OIL WITH VINEGAR AND STARCH …
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