Lost Wax Casting Failure

IvanAlmighty · Aug 17, 2021

amber foundry said: ↑

Before investing or shelling you should degrease with isopropyl alcohol or similar, I often use use methylated spirits. Just a quick mist and work into fine detail with a soft brush. I believe it breaks down surface tension. I've never tried soapy water but I guess that might also work. I actually have a product from Remet in aerosol form for use before shelling but haven't used it enough to gauge its usefulness.
Do you vacuum the investment before you pour around the wax or vacuum the wax within the investment?
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Ahh I see, thanks for the suggestion I'll give that a shot!

Also I've been skipping the pre-pour investment vacuum since I've been worried about time but I'll have to give that a swing..

IvanAlmighty · Aug 17, 2021

Jason said: ↑

For shell, I don't do anything to the wax before the first dip. I send it for a dip, and very gently mist it with a light stream of compressed air. No vacuuming, no "wetting"... nothing!
The air pops any bubbles from the dip and gently pushes the excess slurry off the wax.

For solid block, vacuuming the just mixed investment is a must. After pouring slowly down the side and not just dumping it in, vac it again.
Dumb question here... You are using distilled water right??? Everyone's tap water is different, so don't take any chances, use distilled water per the instructions.
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Ahhh man I've been skipping the vacuuming before pouring but I'll be sure to start now.

Also yup yup, good ol deionized water! I just checked the bottle and mine expired back in December..

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Lost Wax Casting Failure

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