Smooth-Cast ONYX® is a mercury-free urethane resin that cures at room temperature to a deep black, solid plastic. ONYX® resins offer the convenience of a 1A:1B by volume mix ratio and have very low viscosities, so they are easy to mix and pour. ONYX® resins have an ultimate Shore hardness of 80D and offer higher physical properties and higher heat resistance vs. other general purpose resins. ONYX® resins are available in 2 speeds. ONYX® FAST resin has a pot life of 2.5 minutes and a cure time of 10-15 minutes, while ONYX® SLOW has a pot life of 5 minutes and a cure time of 90 minutes. Advantages that ONYX® resins offer over other resins; 1) if you desire a black casting, adding color pigment is not necessary 2) cured plastic is ultra-black and darker than competitive black resins, 3) cured ONYX® plastic can be polished and buffed to a high gloss shine and 4) ONYX® offers higher heat resistance vs. competitive black resins, 5) unlike other black resins, ONYX® does not contain mercury 6) ONYX® is less expensive vs. other black resins. Applications include reproducing sculpture, making prototypes and potting / encapsulation. Due to it's quick cure time and hardness, ONYX® FAST is a good choice for creating fast cold cast bronze, brass, copper, nickel/silver, etc. effects.

Product Name:	A:B Mix Ratio	Color	Comp. Strength	Demold Time	Mixed Viscosity	Pot Life	Tensile Strength	Ultimate Shore Hardness	Weight: CU.IN./LB	How much do I need?
Smooth-Cast ONYX FAST	1A:1B by volume	Black	8760 psi	10-15 min.	100 cps	2.5 min.	5840 psi	80D	27.7
Smooth-Cast ONYX SLOW	1A:1B by volume	Black	11400 psi	90 min.	100 cps	5 min.	7660 psi	80D	27.7

Casting and Finishing Smooth-Cast® ONYX® Deep Black Resin

Mold Star® 15 Demo: Easy Use, High Tear Strength Platinum Silicone

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