TY - JOUR JF - IOP Conference Series: Earth and Environmental Science ID - repository17998 UR - http://repository.uhamka.ac.id/id/eprint/17998/ A1 - Fitria Nugrahaeni, Fitria TI - The Effect of HPMC Concentration as a Gelling Agent on Color Stability of Copigmented Blush Gel Extract of Purple Sweet (Ipomoea Batatas (L.) Lam.) AV - public PB - IOP Conference Series: Earth and Environmental Science ER -