In three installments, we have reviewed the various types of colorants that can be used in soap and bath and body products. We’ve talked natural colorants, such as spices and herbs, as well as FD&C dyes and micas.
Finally, in our series on colorants, we explore ultramarines and oxides. Many soapmakers think they are “from the earth” natural, but that isn’t quite true, and it’s a good thing! At one time, these colorants were used, but it was found that they contained contaminants such as arsenic. Since then, they have been lab-created, free of toxins, to be what is termed, “nature identical.”
Ultramarines and oxides have long been used in soap and cosmetics. Users like them because they generally remain true to color in products and are inexpensive considering the amounts needed to provide color. Use a small amount for pastel color and more for intense color. These are matte colorants. Mix ultramarines in a bit of water or glycerin before adding them to your soap base and add oxides to a bit of your soapmaking oils before adding them to your base so that they don’t clump or speckle.
They are used for mineral makeup and for bath and body products, but again, test them before you sell to make sure you’re product is not oozing color all over the tub, shower and washcloths. Customers are not generally happy when that happens!
Titanium dioxide (TiO2) is often included in this category, but it is unique in that it occurs naturally in minerals and is extracted for use in dozens of applications other than bath and body, from food to siding to paper.
Now, you have it. Go forth and color!
Until next time, may your days be filled with bubbles and wax.