Re: dry pigment for carbon tissue

Jodie Allen (74160.3410@CompuServe.COM)
21 Oct 96 23:22:53 EDT

> When
>grinding pigment it is important to achieve the correct "charge"
>in the mill: about 50-60% grinding media (high density alumina,
>ALO3 is great and dosn't cost that much) then add your pre-mill
>liquid sludge to a point just below the top layer of grinding
>media in the bottle.

I recently tried mixing powdered lampblack with no luck, so have been thinking
about trying the mill approach. However, I am wondering if the dried pigment
actually needs to be "ground" or simply vigorously mixed? The pigments that I'm
thinking of are already milled, so I kind of doubt that they will be ground much
finer by this method. On the other hand, grinding could break up clumps of
pigment particles. Do you suppose a plastic jar or piece of plastic pipe partly
filled with marbles would work? What would be a good source for these mill, and
grinding media here in the US? I am already familiar with Edmund Scientific and
will check their catalog, but can you recommend others?

I bought my lampblack at an art supply store, so presumably painters mix this
stuff up regularly. How do they do this?

- Wayde Allen
(74160.3410@compuserve.com)