What&#;s the best colorant for homemade soaps? It&#;s mica powder! Mica powder is easy to use, and quickly adds vibrant, shimmering colors to both melt-and-pour and cold process soaps. Fortunately, there&#;s an endless variety of mica colors available, allowing you to create bold, colorful hues that match the scent of your bars.
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Ready to get started coloring your soaps with mica powder? This guide will answer all the questions you have about using mica in soap, including:
Keep reading to get tips and tricks for creating vibrant, glimmering hues in your homemade soaps.
Mica powder is a natural mineral that&#;s known for its iridescent properties. Micas have a natural metallic glimmer, and they&#;re one of the most useful and safe colorants for soap. Mica works well in soap for a few reasons:
Now that you have an idea of why mica is so useful for coloring homemade soap, we&#;re going to get into how you can mix it and how much mica you should use.
Learn more about mica powder. See: What Is Mica Powder and What Is It Used For?
If you&#;re new to working with mica powder, know that a little bit goes a long way. You can oversaturate colors if you use too much, and the result will be a grainy bar or a soap that doesn&#;t cure correctly.
To avoid color oversaturation, follow these guidelines:
When working with melt-and-pour soap, aim for 1 teaspoon of mica powder per pound of soap. If you want a more pastel hue, you might use less than 1 teaspoon, or if you want an opaque hue, start with 1 teaspoon, and then add one-quarter teaspoon of mica until you reach the desired color.
When coloring cold-process soaps with mica, start by dispersing the mica in a lightweight oil like almond oil. (Glycerin and isopropyl alcohol work too.) Add 1 teaspoon of mica to 1 tablespoon of oil, and blend until the mixture is smooth without any clumps. Then add 1 teaspoon of this mixture to your soap at a time until the color is just right.
Why Pre-Mix Your Mica?
With both soap-making methods, but especially with cold process soaps, pre-mixing mica usually works best. Color speckling is common when the mica isn&#;t evenly dispersed in the soap base, and the color might appear blotchy or uneven.
By pre-mixing the mica, you&#;ll prevent clumping and can better mix it in with your soap batter. Oils, glycerin or alcohol work best for pre-mixing, as mica isn&#;t soluble in water.
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Mica works great in melt-and-pour soaps, and the coloring process is super easy. Here are three quick steps:
Quick Tip: Clear soap bases work best when working with mica powder, and will result in the most vibrant colors. White or off-white bases work well too, but the colors may morph slightly. For example, a red mica in a white soap base might result in a more pastel or pinkish hue.
Start first by choosing the right colors for cold-process soap. In particular, choose a natural or synthetic mica that has been colored with natural oxides. Choose natural micas that aren&#;t colored with soluble dyes to avoid color morphing.
Adding mica to cold process soap is similar to the melt-and-pour process. Follow these steps:
One Tip: With cold process soaps, it&#;s best to try testing colors in a smaller batch first.
Mixing mica powder in your base will result in an even color throughout, but there&#;s so many different ways you can use mica powder in soapmaking. We&#;ve highlighted other ways you can use it creatively:
Excited to try these techniques in your next soap making project? Slice of the Moon offers a wide range of vibrant micas and glow in the dark pigments that are perfect for coloring melt-and-pour and cold process soaps. Shop our collections now:
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Mica is a name given to a group of silicate minerals, which form distinct sheets and flakes. These are very thin and light, and are most commonly found in schist and granite, giving the rock its shiny, sparkly appearance. It&#;s this sparkle that makes the mineral so attractive to the cosmetic industry. Although mica occurs naturally, it is very expensive to mine and the cosmetic grade micas, which are used in make up, are often synthetically produced in the lab. Keep this in mind when making claims of natural products!
Synthetically produced mica has the same crystal structure as natural occurring mica in rocks &#; a very thin, transparent two-dimensional sheet structure. For example, Geotech in the Netherlands, is one such company, which produces synthetic mica for the cosmetic industry. The mica used in cosmetics is usually transparent and colourless, so to achieve the many hues of colours, it has to be coloured with pigments or dyes.
How to use mica in soap making? The general rule of thumb is to use one teaspoon of mica in 500 g of soap. A trick I learned from Soap Queen, is to disperse the mica in a little lightweight oil &#; I use rice bran oil &#; and mix it with a electric mini-mixer until you have a smooth paste, and add this to your soap at light trace.
I have a love and hate relationship with micas in soap making. I love the bright, sparkly, and often rich shades, and they are very easy to work with. They don&#;t clump and don&#;t speckle the soap. But unfortunately, they are also very fickle in cold process soap, due to particular colourants, pigments, or dyes used to colour the micas, which makes them unstable in the high pH environment of cold process soap making. In other words, you never know what you get. Some micas stay true to their colour, but others morph into other colours, most often grey and brown, and some disappear altogether. The only way to be certain if the mica is colour stable is by testing.
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