There are two types of suncream: chemical and physical. Chemical suncreams absorb the UV rays into heat … physical sunblocks scatter and reflect the UV rays on top of the skin. While they offer a broader spectrum of protection, their photo-catalytic nature and small particle size carry a potential risk. The synthetic compounds have adverse side effects on humans and the environment. …Wood is a material that is very effective at scattering light as a result of its cellular structure, absorbing light through one of its components, lignin. The compound is an organic polymer in the cells of many plants which makes them rigid and woody. It also offers sun protection factors (SPFs) that exceed 180. Lignin has a natural phenolic network that forms a shield against ultraviolet light, offering protection against the sun without the need for petroleum-based filters.The use of lignin as sun protection for skin is promising, particularly as a renewable and waste-free resource.