Smooth-Cast ONYX® is a mercury-free urethane resin that cures quickly at room temperature to a deep black, solid plastic. ONYX® offers the convenience of a 1A:1B by volume mix ratio and has a very low viscosity, so it is easy to mix and pour. ONYX® has an ultimate shore hardness of 80D and offers higher physical properties and higher heat resistance vs. other general purpose resins.
Applications include reproducing sculpture, making prototypes and potting / encapsulation. Because ONYX® is a fast curing resin and becomes hard quickly, it is also great for doing fast cold cast bronze, brass, copper, nickel/silver, etc.
Advantages that ONYX® offers over other resins; 1 - ONYX® is less expensive vs. other black resins 2 - Cured plastic is ultra-black and darker than other black resins 3 - Cured ONYX® plastic can be polished and buffed to a high gloss shine 4 - ONYX® offers higher heat resistance (to 200°F /94°C at room temperature) vs. other black resins 5 - Unlike other black resins, ONYX®does not contain mercury 6 - If you desire a black casting, adding color pigment is not necessary
1 - Smooth-Cast® ONYX® is mixed 1A:1B by volume and poured into a detailed one piece cut-block mold.
2 - After curing, the casting is demolded and flashing is removed with a Dremel tool.
3 - Flashing is removed with a Dremel tool.
4 - Sanding gel is used to further eliminate the flashing seam.
5 - Dremel tool with a buffing wheel is then used to polish the seam to make it disappear.
6 - Smooth-Cast® ONYX® casting reflects perfect detail and is a deep, rich black color.
7 - Also great for creating cold-cast metal effects!