![]() The vacuum grew stronger - just like grandma's canning jars. I put everything in the tank - HOT, then sealed it and pulled a vacuum. I even put a 1 inch thick aluminum plate on the bottom and heated it to 300 degrees. Because it was water based I could heat all the materials to 210 degrees or so. ![]() ![]() The red device uses a compressor at 140 PSI to create a venturi action that would pull a high vacuum. Inside this 2.5 Gallon sealed container I could put 5 quart mason jars in it, each jar having a different color. Here are 2 pictures of what I used originally to color wood. You should be able to use chewing tobacco and even coffee and tea to color bone. I now have some aniline dye that use Denatured Alcohol and should be much thinner than water and be easier to pull in and color the bone. I used wood dye in the past with bone but it was water based and I used a strong vacuum pump to pull the dye in. Leather dye works great and somewhere on another site is a thread about using Rit dye on cow bone - the shin bones are preferable as they are strongest.
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