Metal a bit blurry

[tanuki]

Hi,

i have recently started casting with PA metal. I first used model metal, and the results were perfect. Now i started casting 5 start lead free metal (because i have three small children), and even if the results are good overall, i experience some difficulties;

sometimes, the result seems a bit "blurry" (i dont know how to describe it better), The metal becomes a bit grey and not as crisp as usual. Is it a problem of temperature ? Too hot or too cold ? Or some impurities ?

Thanks,
Gilles

[Prince August]

Nov 5, 2010 8:36:54 GMT tanuki said:

Hi,

i have recently started casting with PA metal. I first used model metal, and the results were perfect. Now i started casting 5 start lead free metal (because i have three small children), and even if the results are good overall, i experience some difficulties;

sometimes, the result seems a bit "blurry" (i dont know how to describe it better), The metal becomes a bit grey and not as crisp as usual. Is it a problem of temperature ? Too hot or too cold ? Or some impurities ?

Thanks,
Gilles

5 Star metal requires about 350 degrees celsius for casting while Model Metal is ready at 200 degrees.
You need to heat your moulds more than normal (so they are quite warm).
This should address the blurry aspect as they will have time to fill the details more before going semi-solid.