For anyone mixing hair colour or developer, whether that's a professional colorist doing single-process colour, highlights, or balayage in-salon, or someone doing their own colour at home. No particular skill is needed beyond basic colour-mixing know-how.

A plain mixing bowl leaves you guessing at ratios by eye; the graduated markings here take that guesswork out, which matters more than it sounds like it would when an off developer ratio can change your processing results.

Pour colour and developer (or bleach) into the bowl, using the graduated markings to measure your ratio. Mix with a tint brush; the no-slip base keeps the bowl steady on your counter or cart while you stir.

The graduated interior markings genuinely help with ratio accuracy compared to a plain, undecorated bowl, and the no-slip base is a real functional feature for stirring one-handed without the bowl sliding around.

It has no lid or pour spout, so it's built for mixing at your station rather than transporting a pre-mixed batch, and there's no published data on how it holds up to repeated bleach exposure over time.