Be sure that your investment had enough time to harden and follow the
specifications from the supplier.Normally, it takes about 1 1/2 hours
to set depending on the size of the mold.
Be careful and pay extra attention on the mold while you’re handling
it during pouring procedure.Investment is extremely brittle in an hot
condition and will crack easely if you handle it to rough.
Slower your ramp factor.Do not increase the temperature to fast since
this can cause all kinds of little fractures and unwanted
disformation of your wax pattern.
Some people like the idea of making their investment more liquid by
adding more water to the slurry(or less investment). Forget it
!!! The amount of investment you save is not worth the trouble.
Believe me, it’s not saving you anything at all !
Regards Pedro Palonso@t-online.de