TY - JOUR A1 - Fitria Nugrahaeni, Fitria AV - public 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.) UR - http://repository.uhamka.ac.id/id/eprint/17998/ PB - IOP Conference Series: Earth and Environmental Science ID - repository17998 JF - IOP Conference Series: Earth and Environmental Science ER -