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I was considering a series of low-pressure pulls. I would guess that the brittleness of ivory is greater than horn or bone so It might be prudent to use a low-pressure series of pulls on the...

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A vacuum chamber can be made from a mason jar with a lid, a one-way check valve, and a one-way brake bleeder. Gssixgun had a thread on this in the past. Check with him or someone may have a...

My brother used my vacuum pump and built his own chamber from 1/2" acrylic. He used that setup to stabilize some spalted maple.
I had several years earlier used a "pressure pot" made from a spray...

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I do, and I want to use it if it will help.

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Has anyone tried using a vacuum chamber to pull in the neatsfoot oil into the horn scales, or mineral oil into the bone or ivory?
...or neatsfoot oil/mink oil into a strop?