Thanks
@Bok. Learning about clay mostly from online photos is a bit tricky...
And yes, apologies, I did mean qing shui ni as a particular Factory 1 subset of zini, versus zini more generally. I assume that that's what people mean when they refer to qing shui ni. Of course, if you just call it zisha like this seller did from memory, then no-one can really complain about anything being misrepresented.
I also thought that I read around here at some point that qing shui ni in LQER times or thereabouts was a description of the strata that the clay came from, in contradistinction to what we might now call di cao qing, but again, I may have misunderstood or misremembered.
And I have no idea what hong qing shui ni is; presumably, another batch or subset of zini during Factory 1 times (though a lot of them seem to be under-fired from what I can tell, and I'm not sure if that is part of it).
Much to learn, I guess. So long as learning about clay remains fun, and not tedious, I'll keep going.
Andrew