Quote Originally Posted by arvidj View Post
Mark,

Was this the "flour" you used ... Laguna Silica, 200 Mesh in Bulk ...

I am in search of "flour" locally and need to have something as an example as "quartz flour" is getting the deer-in-the-headlights look when I ask about it.

Thanks,
Arvid
This is what I got:

Laguna Custer Feldspar in Bulk

FYI, After looking grading curves and reading the giant thread, I ended up using displacement measurement to come up with the following for a mix. I really wanted to use local aggregates wherever possible to save shipping and reduce overall cost. Empirical observation and practical considerations are the basis for the mix:

Attachment 272692