What is color “morphing”, and what are the best colors to use when making cp soap?
CP Soap has a very high pH while it undergoes saponification. This high pH can cause many colors to “morph” and change color. While some soapmakers enjoy the unpredictable nature of CP soap coloring, many others prefer to be able to accurately predict the final color of their soap. Colors such as ultramarines and oxides most often produce quite predictable final colors. Natural botanicals (such as alkanet root, beet juice, etc.) produce unpredictable shades which can even vary from batch to batch of the same soapmaking recipe. Synthetic colorants (like FD&C colourants) are not used because the high pH turns the FD&C colors brown.
