The main ingredient of this product is HAMA (methacrylated hyaluronic acid, molecular weight 150k-250kDa), has good biocompatibility, can be stimulated by ultraviolet light or visible light (blue light), and can be mixed with basic biological materials or other bio-inks of Shangpu to form a three-dimensional structure suitable for cell growth and differentiation with a certain strength. https://www.cd-bioparticles.net/p/12545/hama