What to use to substitute for goldwell colorance developer?

If you need a substitute for Goldwell Colorance developer, you can use a different brand's cream or liquid developer that is formulated for the same volume (10, 20, or 30 volume) as required by your color treatment. Make sure to check that the developer is compatible with the specific hair color product you are using. Additionally, consider using a developer that is ammonia-free if you're aiming for a gentler formulation. Always perform a patch test before applying any new products to ensure compatibility and avoid adverse reactions.