In a message dated 6/12/01 8:57:10 AM Pacific Daylight Time, [log in to unmask]
writes:

Phil:  Happy to help, do be careful, you have made a coupla errors that could
have been dangerous if implimented....

<< What it the standard formulations for sodiium peroxide or ammoniun peroxide
 microetch

You mean, Phil, Sodium or Ammonium PerSULFATE, (There exists Sodium Peroxide,
and you do not want to go near the stuff.....)

Figure 8 oz/gal (60 grams/liter) Sodium Persulfate, which is preferred over
the Ammonium salt, because the Sodium Salt does not chelate, thus waste
treats easily.  Add 1-2% Sulfuric Acid, you there.

 and the sulfuric/hydrogen peroxide

The big problem with sulfuric/peroxide is that the peroxide is inherently
very unstable, and you gotta buy a proprietary additive to keep it stable,
otherwise, things can get a little unstable as you introduce Copper into the
solution.

  Also is the temperature elevated or at ambient temperture.

Temp usually runs ambient to slightly elevated (under 100 F)  depending on
spray or soak, immersion time, etc.
  >>
Rudy Sedlak
RD Chemical Company

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