crystaldot
New Member
Hi,
I have not had much success with bombs away method as I am still getting bubbles on items such as roses where there are deep cuts and corners, as I am getting bubbles. Yesterday I tried a skim coat of rtv, I did not let the skim coat dry as I then poured on the bombs away to fill the rest of the mould. I found less bubbles with the skim coat by in undercuts of the small shapes I am molding I still found bubbles. My question is should I skim coat and let it dry first before filling the mold with the bombs away, or should I skim coat then do the bombs away straight away. As I still got some bubbles even when I did a skim coat, where the designs when around sharp corners (I am molding small pieces with lost of detail) should I buy a vacuum chamber, if yes should I just vacuum it first before pouring (my items are poured in to very shallow pots, so do not have room for expansion of rtv) will that be enough or will I still get bubbles when a design has a sharp corner or crevice of a petal etc.
Would really appreciate any thoughts on this please, as I am trying to avoid paying out for a vacuum chamber.
thanks so much
Crystaldot
I have not had much success with bombs away method as I am still getting bubbles on items such as roses where there are deep cuts and corners, as I am getting bubbles. Yesterday I tried a skim coat of rtv, I did not let the skim coat dry as I then poured on the bombs away to fill the rest of the mould. I found less bubbles with the skim coat by in undercuts of the small shapes I am molding I still found bubbles. My question is should I skim coat and let it dry first before filling the mold with the bombs away, or should I skim coat then do the bombs away straight away. As I still got some bubbles even when I did a skim coat, where the designs when around sharp corners (I am molding small pieces with lost of detail) should I buy a vacuum chamber, if yes should I just vacuum it first before pouring (my items are poured in to very shallow pots, so do not have room for expansion of rtv) will that be enough or will I still get bubbles when a design has a sharp corner or crevice of a petal etc.
Would really appreciate any thoughts on this please, as I am trying to avoid paying out for a vacuum chamber.
thanks so much
Crystaldot