The main objective of the research is to investigate the organic additives if they are from animal or vegetable source and inorganic, mineral or non-metallic additives for two different types of resin matrix, which are epoxy and polyester and presenting different studies in finding the mechanical properties of the composite materials produced as a result of mixing these materials with different additives and proportions after conducting Several mechanical tests such as tensile strength, bending strength, impact resistance, and hardness resistance, and then conclude and extract what many researchers did.