A question regarding head shrinking

[LonnieFisher]

I want to try the OMS method of mold shrinking.

[LonnieFisher]

To get a 1/6th to a 1/9th, it might be best to shrink the original(if it will), then make an OMS mold of it that will shrink. Then maybe another mold to shrink, depending on what size you've gotten it to.

[David Lee]

Put your hydrospan in the freezer and use ice water to mix it with...also put your mold in the freezer...this will more than double your work time. I have time to pressure cast it, so no bubbles...mind you , you still gotta move fast

Dave