Coated Mica Pigments differ from regular mica in that their coating allows the mica to freely suspend in water, unlike regular mica which tends to float on top and then cling to surfaces such as the bath itself or your skin. This ability to stay in the water and then wash away makes them particularly suitable for adding deep and rich colour to Bath Bombs.
They avoid problems associated with adding large amounts of dyes, such as deeply colouring the water, and they avoid problems associated with some mineral pigments such as with Ultramarine Blue which reacts with citric acid releasing sulphur dioxide. This makes coated micas particularly useful when creating vividly coloured bath bombs, especially with blue-spectrum colours as they will not cause staining of worn bath surfaces and will not leave unpleasant residue on your skin.
It is important to note that with worn bath surfaces, tiny mica particles may still become trapped in surface irregularities, so when this is the case, thorough cleaning should remove them.
The strength of colour obtained from any dye or pigment is dependent upon the concentration used. Using concentrated dyes or pigments may result in deep colour that can bleed from the product in use and/or discolour surfaces. We suggest that all dyes and pigments are used sparingly, further diluted where necessary, and chosen so as they are appropriate for the use they're being put to. The Soap Kitchen cannot accept any responsibility for any unexpected consequences as a result of the use of any of our dyes or pigments. It is the customer's responsibility to check that any dye or pigment is suitable for the use that they intend it for and test the dye or pigment for suitability.