What is the difference between a chemical and physical sun block?

Chemical sun blocks contain ingredients which absorb harmful UV rays. This process takes place in the actual layers of the skin. Here, the chemical sun block reacts with the harmful rays and transforms them into a different kind of energy, mostly heat. A physical sun block works like a shield to reflect the actual UV rays, keeping them from penetrating the layers of the skin. All of the Image Skincare SUN products contain a physical block. In order for a sun block to be effective, it needs to offer broad spectrum UVA/UVB sun protection, like all of our SUN products. In addition to providing the best protection, all of Image Skincare's SUN products are also moisturizers which can be used daily even if you are not exposed to the sun.  more