The application of mica in candle making is relatively straightforward. Candle makers can sprinkle mica powder directly into melted wax; starting with small amounts and gradually adjusting to achieve the desired intensity. Alternatively, mica can be mixed with a small amount of oil before being added to the wax; this method helps to prevent clumping and ensures an even distribution of color. The result is a candle that not only looks beautiful but also retains the quality of the wax and fragrance.

A group of parallel cleavages can be seen in a photograph of biomica under orthogonal polarized (left) and single polarized (right) mirrors.

A group of parallel cleavages can be seen in a photograph of biomica under orthogonal polarized (left) and single polarized (right) mirrors.

Mica is a very common rock-forming mineral, widely distributed in crystalline rocks. Its general chemical formula can be expressed as:

The mica variety that does not contain iron is colorless in flakes, and the higher the iron content, the darker the color, and the more polychromatic and absorbable it is. According to the different chemical composition and optical characteristics, mica group minerals can be divided into Muscovite subgroup, biotite-phlogopite subgroup and lemica subgroup. The common mica are biotite, phlogopite, Muscovite and so on.

In short, there are significant differences between natural mica powder and synthetic mica powder in production methods, color and appearance, performance characteristics, application fields, and price and cost. Synthetic mica powder is superior to natural mica powder in terms of high temperature resistance, transparency, electrical insulation, stability and mechanical properties, while natural mica powder has more advantages in resource acquisition, cost and color. When choosing which type of mica powder to use, you can consider the high temperature resistance of the required material, electrical insulation performance, transparency and color requirements, evaluate the mechanical strength and hardness of the required material, consider chemical stability and other different application scenarios and technical requirements to make a reasonable choice.

Furthermore, while mica itself is not toxic, some individuals may experience allergic reactions to certain pigments or additives used alongside mica. For this reason, it is essential to read labels carefully, especially for those with sensitive skin or known allergies.