Complete Buyer's Guide to the Bk Beauty 109 Mini Contoured Foundation Brush
Dense synthetic brushes trap cream emulsions, skin sebum, and silicone cross-polymers deep within their inner core. If left unwashed, foundation dries along the lower bristle shafts, stiffening the fibers and causing micro-breakage during use.
Deep clean the 109 Mini every seven to ten days. Use a solid conditioning brush soap or an alcohol-free cleansing liquid. Avoid harsh dish detergents; stripping agents break down the adhesive securing the synthetic filaments inside the brass ferrule.
Rinse the head strictly under lukewarm water angled downward. Never submerge the brush past the ferrule crimp, as trapped water dissolves the internal glue bond and prompts bristle shedding. Once rinsed clean, reshape the slanted dome with a dry microfiber cloth and lay the brush flat on an angled towel or inside an elastic brush guard. Never dry the brush standing upright in a cup.
