I have just started making wax models from RTV molds, using
Castaldo blue injection wax, and a high percentage of my wax copies
have small ripples in the surface (reminds me of an old fashioned
washboard, or a fingerprint). Any idea as to why this is happening,
and what the cure is?
Stan, Your wax is chilling to fast in the mold. Try increasing the
temperature of the wax or mold. Also you can try a higher pressure to
get the wax into the mold faster.