Smooth-Cast™ 320 Series Liquid Plastics - The Smooth Cast 320 Series consists of new ultra-low viscosity/low cost casting resins that yield virtually bubble-free castings. SC 320 Series resins yield castings that are off-white, and are sister products to our popular SC 300 Series of Bright White Plastics. SC 320 Series resins pigment better and are lower in cost. Easy to mix and pour, these resins offer the convenience of a one to one mix ratio (one Part A to one Part B by volume). Fully cured castings are tough, durable, machineable and paintable. They resist moisture and mild solvents. Applications for SC 320 Series resins include reproducing small to medium size sculptures, making prototype models, special effect props, decorative jewelry, etc.