Sheesh.  a <$5 "tupperware" container will work fine, and they're available in
a wide variety of sizes (many rectangular.)  A major reason for the popularity
of ferric chloride in hobbyist PCB production is that it DOESN'T require all
those extras like heaters, bubblers, sprayers, and so on.  Those might make
things go faster, but room-temperature drop-it-in and agitate every couple of
minutes will work.

BillW

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