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Mold Mix 6

This is part three of a multi-part tip on Mold Mix 6, a refractory molding compound made by Zircar.  Click here to read part one.

The process for applying Mold Mix 6 to a model varies depending on the type of model being used.  Here's the basic process for applying to a wax positive as part of the lost wax process.

1.  Simply mix up a small amount of Mold Mix 6, then paint it directly onto the wax in thin layers.  Use a soft brush, and remember that the finish of the initial layer on the wax will determine the finish on your cast piece.

2.  Don't worry if the Mold Mix wants to separate, just keep applying with gentle strokes.  It's usually best to start at the top of the model and move down.

3.  Once you've painted on a single layer, place it near a fan so that it dries quickly.  The layer should be tacky (but dry) before continuing with another layer.  Multiple thin layers are preferable to fewer thick layers.

4.  Each layer should be painted in a different direction.  Ideally, you want the layers to almost be woven across each other.  Evenness is also important.  This gives the final mold more strength.

5.  Continue adding layers until the mold is at least 1/16th inch thick.  It can be as thick as 1/8 inch (3cm) if desired, but no thicker.  If the layers are too thick they can shrink excessively and unevenly and cause problems with the model.

6.  Allow the mold to dry completely.  This will take two to three days.

Coming soon -- information on using Mold Mix 6 with other materials, as well as information on removing the model material from the mold.


Copyright 2006 Brad Walker.  All rights reserved.

Thanks to Melanie Rowe and Leslie Rowe Israelson for their suggestions on using Mold Mix 6.

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Copyright 2005-2006 by M. Bradley Walker.  All rights reserved.

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