Homebrew PCBs

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 ! ! ! 


[Non-text portions of this message have been removed]