Mike Harrison quoted Robin Moorshead on his page,
www.electricstuff.co.uk/pcbs.html (how to make PCBs) on how to make
your own silicate developer using water glass and sodium hydroxide
crystals.  Anybody know if the addition of sodium nitrate to the NaOH
crystals will screw things up?  When I buy NaOH from my "favorite"
chemical supplier (Walmart, in the plumbing area, as a random brand of
drain cleaner) it comes with some sodium nitrate.  Anybody know if
this "contaminant" will screw up the developer?

(I'll just give it a try anyway :-)

Mike
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