Bath bombs and soap are high-pH, wet systems — exactly where many decorative pigments shift, bleed or dull. Choosing cosmetic-grade, pH-stable effect pigments is the difference between a premium bath product and a grey, patchy one.
| Symptom | Likely cause |
|---|---|
| Colour shift / dulling | Pigment not stable at the system pH |
| Bleeding into water | Wrong grade or contaminated carrier |
| Patchy finish | Poor dispersion or incompatible glitter |
Q: Will my pearl survive the curing soap (high pH)?A: Only grades validated for soap. Test a small batch through full cure; a pigment stable in cold-process may still shift in hot-process or high-lye systems.
Q: Is cosmetic glitter safe to rinse down the drain?A: Prefer biodegradable (cellulose) glitter for rinse-off formats; even then, follow local disposal guidance — certification describes breakdown, not permission to release.