Fish glue (adhesive agent) was the collagen extracted from skin and bone which obtained from the fish processing waste. This report was aimed to develop fish glue from Thai fish skin (1) and its application for poster watercolor for children by using fish glue as adhesive for painting material instead of chemical agent (2). The results showed that (1) Milkfish (<i>Chanos chanos</i>) was an appropriate species for glue production from twenty species. Hydroxyproline content was a factor affected on adhesion of glue and suggested that characteristic of glue required hydroxyproline content at least 213.7 mg/g of glue. The chemical properties of glue including moisture, ash, fat, protein and carbohydrate were 97.26%, 0.061%, 0.342%, 1.214% and 1.127% respectively and the physical properties of glue including pH and viscosity were 3.35 and 18,330 cP respectively. SDS PAGE pattern showed that the glue was collagen type I which was composed of α1(144 KDa) and α2 (129 KDa) chain. This character corresponded to the FTIR spectrum profile and amino acid composition according to previous report. Yield of glue from milk fish skin was 68.82%. (2) The optimal formula for poster watercolor from fish skin glue (FSG) was the proportion of corn starch: baking soda: acetic acid: FSG (by weight) as 10: 5: 5.5: 5. The product showed fast drying, coagulation (smoothness) and adherence with cracks-free paper painting (at least 30 days) and high viscosity; The proper natural color sources, mixing into adhesive formulation were Butterfly Pea and Beetroot. This product obtained stable color value (L, a and b*) for at least 30 days storage. Different containers (clear plastic bottle, opaque plastic bottle, amber glass bottle and clear glass bottle) do not affect the color stability. Organic ingredients represented compostable product and highly safe for specific users. It was equivalent to a commercial product.

Fish glue from fish skin and the paint art application for children poster watercolor

ACS Spring Meeting 2021

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