Color stability evaluation of pigment extracted from hylocereus polyrhizus, clitorea ternatae and pandanus amaryllfolius as cosmetic colorants and premarket survey on customer acceptance on natural cosmetic product

As public concern towards the long term effect of synthetic materials used in cosmetic formulations,
such as the synthetic colorant, therefore natural ingredients are getting more preferred. In this
research, evaluation of potential natural colorant extracted from H.polyrhizus, C.ternatae and
P.amaryllfolius were investigated in terms of pigments stability against heat exposure. Pigments
from each sample were exposed at different temperatures (30°C, 37°C, 40°C, 50°C, 60°C, 70°C,
80°C). Color intensities were measured at 517 nm and compared with control over a week to observe
color changes and absorbance readings. Heat treatments were done to investigate the suitability of
pigments to be incorporated as colorant in cosmetics products (lipstick) because the production of
lipstick required high temperature to melt the ingredients. Pigments from H.polyrhizus showed to
be most stable after heat treatment in comparison to C.ternatae and P.amaryllfolius. A premarket
survey was done to investigate the customer acceptance on natural vs. synthetic products. Extracts
from H. Polyrhizus (red), C.ternatae (blue) and P.amaryllfolius (green) were used to produce natural
lipstick where matching synthetic colorant were used to produce another set of lipstick. An online
survey was sent to 50 respondents all over the world from the age of 16-52 years old to investigate
acceptance on the natural vs. synthetic product. Ranking test (Likert Scale) and hedonistic test were
used to compare the best accepted product, color and pH. The consumer acceptance was investigated
using the Ranking Test (Likert Scale) and Hedonic Scale test. At the end of the investigation, natural
red lipstick was being chosen as the best preferred lipstick at 80% regarding its color and pH. All
statistical analysis was done by SPSS and p value <0.05 was considered as significant. The finding
suggested that natural colorant (red) was more preferred in comparison to synthetic colorant in
cosmetic product based on its color and pH preferences. Thus, focus should be directed towards use
of H.polyrhizus in cosmetic products due to higher stability and customer preferences.