GC America?s renowned Initial IQ Lustre Paste NF technology is now available for gum shades. GC Initial IQ Lustre Paste NF Gum Shades are 3-dimensional ceramic stains developed to enable technicians to create a life-like transition from the crown margin to the gingival just by painting the gum shades. Type IV Die Stone in it's physical properties and workability. This die stone is ideal for all kinds of prosthetics, with high precision, outstanding edge hardness and high pressure stability. Thus a precise model as a basis for precise prosthetics is achieved.