In a message dated 3/21/2004 6:40:15 PM Central Standard Time,
jim@... writes:
ammonium persulfate which although clear and allows viewing the etch progress
apparently is difficult to store over time...especially in plastic.
Whew! Yep, I bought a few lb. of that stuff (dry form) from Kepro when they
were still alive. Came in a plastic "tub" with snap-on lid like cheap
Tupperware. Put it on a top-shelf of a book-case in my lab. MISTAKE! In a few
months, it ate through the tub and, drawing moisture from the air, made a goo that
slithered down all among books, wood, and carpet. Made a mess! I decided I
do SO few PC's, I'll stick with R.S.'s FeCl-3 ! ! !
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