👉 Darkeners are substances that absorb light and reflect it, making them appear darker than they actually are. These substances can be found in a wide range of products such as cosmetics, paints, and dyes, which have been used for centuries to create a variety of shades and colors. For example, some darkening agents used in cosmetics include iron oxides (like titanium dioxide), aluminum silicate, and calcium hydroxide. These substances absorb light, causing the pigment inside them to appear darker than