Pemanfaatan Gambir sebagai Bahan Dasar Pembuat Tinta Spidol Ramah Lingkungan

Abstract

Gambier can be used as a raw material for the manufacture of eco-friendly ink. This study was aimed to produce an alternative marker ink which is safer for the environment and human health. The current ink products generally contain volatile organic compound the chemical that can damage health. The study was done in several stages, raw material preparation, gambier extraction, color pigment making, ink formulation, and continued with stirring by used a high-speed homogenizer for the best formula. Variations of stirring speed were 1000, 1500, 2000 rpm and stirring time 10, 20, 30 minutes. The results showed that the best ink was obtained from the homogenization process with stirring time 30 minutes and speed 1000 rpm. The composition of gambier pigment 85%, glycerol 3%, polyethylene glycol 2%, propylene glycol 5%, and the addition of preservatives crystal violet 1%. The characteristics of markers ink were size particles 15.44 d.nm with a poly diversity index 0.186 and specific gravity 1.0254, black color ink, homogeneous, writings were not disjointed, and 6 minutes dry time.