and many colorants are water-soluble. Therefore, if you want to make a soap that,
instead of being a solid color, has a pattern or design, your best bet is to use colorants
that are oil-soluble; another option is to use colorants that aren’t soluble, and color the
soap via dispersion (meaning that the particles are suspended throughout the soap,
instead of being dissolved in it). Oxides and most micas will color soap without
bleeding.
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