Build a solid foundation in science, formulation and product development—find out more!
Most Popular in:
Specialty Pigments: Properties and Effects
By: Edwin B. Faulkner, Sun Chemical Corp.
Posted: September 4, 2012, from the September 2012 issue of Cosmetics & Toiletries.
Purchase This Article
- From Cosmetics & Toiletries
- September 2012 issue, pg 650
- 6 pages
- Adobe PDF for download
- Printed copies mailed to you
From $9 an article
Specialty pigments tend not to be used in large volumes due to regulatory restrictions, handling and compatibility issues, cost or simply because their effects are only needed in certain instances. Despite their limited use, these pigments bring unique effects to personal care products, thus they are an important class of color additives for the decorative cosmetic industry. Following is a review of their properties and benefits.
In contrast to pigments composed of iron oxide and/or titanium dioxide-coated natural and synthetic micas, metallic specialty pigments are truly metallic—essentially, the pure metals aluminum, copper and bronze. Their mechanism of color display is different from absorption and effect pigments. Absorption colors operate by selectively absorbing, reflecting, refracting and transmitting light, as shown in Figure 1. Here, arrows show incident light being reflected at both specular and diffuse angles, and being transmitted through the crystal. In contrast, metallic pigments produce color by reflecting the entire wavelength range of incident light, producing a bright metallic look similar to jewelry. Figure 2 demonstrates this mechanism, where the flat, platelike particles are the metallic pigment and the arrows are incoming reflected light, most of which is at the specular angle.
This is only an excerpt of the full article that appeared in Cosmetics & Toiletries, but you can purchase the full-text version.
Regulations, Stability, Color Aesthetics, and Economics.
Coloring the Cosmetic World: Using Pigments in Decorative Cosmetic Formulations covers the four dimensions to selecting colors for cosmetics. Take note of the chapter on color stability which describes the various colorants you will use in your product and includes a chart listing compatibility of colorants with a number of solvents. Photos rendered in full masstone color!
Read Expert Reviews! Order Today at Alluredbooks-Practical Color Science Book