I had intended to use potash, but already had the other stuff on hand for
bookbinding, so I figured I'd give it a shot. I don't have a clearly
defined formula yet -- still tweaking it. The eyes come out beautifully on
the size but still tend to distort here and there on the print. I'll try
to get a good picture next time I give it a go.
Whereas potash can have some caustic properties to it, the K2CO3 is
strongly alkaline. I couldn't tell you the exact differences, but in
theory the pure salt doesn't contaminate the carrageenan as much. Using
this stuff, my eyes don't come out very large. It's a fine field of small
ones, the largest ones being about the size of a nickel, maybe a few that
are a tiny bit larger.
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