Development of Eco-friendly Vegetable Powders and Colored Scrub Beads Using Hybrid Coating Technology

Purpose: Starch was coated with magnesium myristate and lauroyl lysine using hybrid coating technology to develop powder materials for makeup cosmetics. PlanCare are water-resistant powders, and Neo Beads may replace plastic beads. Both are biodegradable and ecofriendly materials with potential applications in the cosmetic industry. Methods: Starch hydrolysis using amylase and cell viability test were conducted for comparison with starch. Stability test was conducted by measuring the color differences using a colorimeter after storing the samples for 5 months at 4°C, 25°C, 55°C, and −20°C and under daylight conditions. Results: The amylase assay confirmed that the powder material (PlanCare), coated with magnesium myristate using hybrid coating technology, exhibited a biodegradation rate similar to that of starch. The biodegradability of other PlanCare samples and Neo Beads was also demonstrated. Colorimetric analysis demonstrated that PlanCare maintained stability for 5 months, similar to starch, irrespective of storage temperature and duration. Neo Beads also remained stable irrespective of storage conditions. As the ΔE value represents the total color difference in L*, a*, and b* , it can be used to evaluate color stability. A 5-month comparison showed that it is generally difficult to perceive a range of 1.5–3.0. Both PlanCare and Neo Beads maintained ΔE values at <2.0, confirming their stability. Conclusion: Due to the increasing concerns on the risks posed by microplastics, the cosmetic industry is focusing on alternatives. PlanCare and Neo Beads demonstrated their potential as biodegradable and ecofriendly cosmetic materials.