The Tint Brush is a handheld color-application tool used to mix and apply permanent and semi-permanent hair color, bleach, and toner directly to hair and scalp sections. Its flat, angled bristle head loads color evenly and presses product into the strand, giving a colorist more control than pouring dye straight from an applicator bottle.
This is a Smooth&Charming house-brand brush rather than a named manufacturer's tool, so specific bristle material and handle construction are not published by a manufacturer. It is best understood as a general-purpose, reusable tint brush suited to root touch-ups, full-head color application, and sectioning work.