Karaginan dapat digunakan sebagal pengental berdasarkan mekanisme pembentukan gel. Penelitian inl memanlaatkan karaginan mumi domestik dalam formulasi losio. Karaginan dapat berfungsi sebagai stabilisator dalam losio. Penelitian ini menggunakan kappa dan iota karaginan dengan konsentrasi 0.3%; 0,5%; 0,7%; dan 0,9% sebagai pengental, kemudian dit)andingkan dengan losio yang menggunakan Hidroksietilselulose (HEC). Evaluasi yang dilakukan meliputi tes organoleptis, pengukuran viskositas dan sifat alir, diameter globul rata-rata, pH, uji sentrifugasi, stabilitas fisik pada suhu 40''C. kamar, dan selama penyimpanan tiga bulan, fmezeAhaw dan cycling test. Hasil terbaik dipilih berdasarkan pengukuran pH. stabilitas tisik selama tiga bulan pada suhu 40®C, kamar, dan 4®C, freezeAhew dan cycling test.

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Carrageenan can be used as a thickener based on the characteristic of geiling mechanism. The purpose of this research is to use domestic refine carrageenan in the lotion. The function of carrageenan as a stabilizer can effect the stability lotion. The experiments had been done using kappa-iota carrageenan (1:3) 0,3%; 0,5%; 0,7%; and 0,9% as a thickener compared to Hydroxyethylcellulose (HEC). The evaluation consisted of organoleptic test, viscosity and flowing characteristic test, diameter globule test, pH value measurement, centrifiigation test, physical stability in elevated temperature {40®C) test, stability in room (29^-32,5®), and 4®C temperature during three months, fireeze/thaw and cycling test. The t)est result was based on pH value measurement, physical stability in elevated temperature (40'^C) test, stability in room (29*» -32,5®C). and 4®C, freeze/thaw and cycling test Key word: carrageenan, lotion, thickener, stabilizer, stability test.