Agar Gracilaria sp. is potential seaweed in Indonesia with largely opportunity to be used as raw material for cosmetics, especially skincare creams, lotions, powder, lipstick, facial makeup, and soap. Liquid bath soap is one of the cosmetics that require thickener in the composition, which often generally uses carcinogenic cocamide DEA. On the other hand, agar Gracilaria sp. has a gelling agent capable of having a thickening effect on certain products such as liquid bath soap. This study aimed to determine the potential of agar Gracilaria sp. as a thickener agent in liquid bath soap as a cocamide DEA substitute. This study used agar Gracilaria sp. with a percentage of 0, 1, 2% and 1% cocamide DEA. Parameters determined were the viscosity, pH, specific gravity, microbial contamination, and organoleptic. Data were analyzed using analysis of variance (ANOVA) and Duncan test, while organoleptic data analysis used the Kruskal Wallis test. The study results showed that the addition of 1% Gracilaria sp. agar had 762.22 cPs viscosity, pH 9.06, 1.05 g/ml specific gravity, and <1x101 colonies/ml microbial contamination.

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Gelatin is a polypeptide derived from collagen in the skin and bones of mammals or fish. The utilization of bader bang especially bader bang fish bones as raw material for gelatin is still not widely found. The purpose of this study was to determine the effect of different extraction solutions on the characteristics of bader bang fish bone gelatin and to compare the characteristics of the bader bang fish bone gelatin produced with the standard. The study was carried out using a completely randomized design (CRD). The best results from the three treatments were found in the extraction of gelatin in the treatment NaOH 0,2% + H2SO4 0,2% The characteristics of water content, ash content, viscosity and gel strength complied with SNI 06-3735 and British Standard 757.

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