Excellent low cost alloy where relatively light weight is not a problem. JA7 is a lead based alloy. It is suitable for larger objects over 50mm wide and over 5mm thick. Must be used with a high heat silicone such as Wacker M4670 or M4470, the release agent is Graphite powder Casting range: 310°C - 360°C. Each stick of JA7 varies in weight, averaging at approx. 300gms.
Directions:
Heat metal in a temperature controlled cooker or pot on the stove until JA7 becomes a liquid, do not over heat the alloy. Pre-dust silicone molds with Graphite. Pre-heat molds to 120C (read silicone technical data sheet) or recycle first cast until desired surface finish is reached. Once cooled JA7 can be polished to a high-quality finish.
Sealers must be applied to avoid oxidation. Various sealers are used from automotive wax to a lacquered base paint. Pre-test any paints for adhesion prior to production.
Please note: the average weight per stick of JA7 is 250-330gms.
Release agent for low melt alloys is Graphite Powder Click here to view
This product was added to our catalog on Thursday 22 December, 2005.
