%0 Journal Article %A Fitria Nugrahaeni, Fitria %A UHAMKA, %F repository:17998 %I IOP Conference Series: Earth and Environmental Science %J IOP Conference Series: Earth and Environmental Science %T The Effect of HPMC Concentration as a Gelling Agent on Color Stability of Copigmented Blush Gel Extract of Purple Sweet (Ipomoea Batatas (L.) Lam.) %U http://repository.uhamka.ac.id/id/eprint/17998/