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Exposure of UV light can cause skin rashes and sunburn, stimulating the formation of melanin. Long term UV exposure also can cause skin cancer. One way that can reduce negative impact of UV exposure is by using sunscreen. The aims of this study were to obtained the best ratio of seaweed  P. australis  and  E. cottonii  slurry to produce sunscreen cream and as well as obtaining sunscreen formulation with good stability. Creams were formulated consist of cream with different ratio of seaweed  P. autralis  and  E. cottonii  slurry, i.e. A (control), B (1:1), C (2:1) and D (1:2). The commercial creams product also used as a comparator (KI and KII). The best ratio of  P. australis  and  E. cottonii  slurry was showed on cream B (1:1). Sunscreen creams have a good level stability, with no phase separation of dispersant and dispersed phase, and also no discoloration. Sunscreen creams have at least 1 year shelf life as there was no phase separation after centrifugal force at 3,800 rpm for 5 hours.

Characterization and formulation of sunscreen from seaweed Padina australis and Euchema cottonii slurry