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2000 Washington Ave.      St. Louis, MO 63103     Phone: 314-241-3387         Fax: 314-241-2443 

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The one source for all your finishing needs!!! - Plating - Polishing - Phosphating and Oxidizing

Parish O Co. is a privately owned company founded in 1964 by George E. Parisho. Located in St. Louis. MO, Parish-O Co. specializes in offering our customers the best in plating chemicals, supplies, equipment and technical service. This web page lists our "core" product line, however, other products are available at your request. Our staff is available to provide on-site technical assistance, troubleshooting and complete laboratory analysis.


Let us be your Non-Cyanide Supplier

Copper 30/30

The state of the art in non-cyanide plating. 30/30 plates directory over steel, brass, zincated aluminum, zinc diecast and white metal. Excellent as a strike for heat treat stop-off. Listed on Boeing spec. BAC 5722 for commercial, defense and aerospace applications

Silver 50/50

Non-cyanide alkaline silver plating. Exhibits adhesion superior to cyanide silver. Plates directly onto brass, copper and bronze without a separate strike. Superior color - brilliant white. Plates out of the anodes.



Add PRO-pHx at 1% to acid solution and filter.  PRO-pHx may not be effective at concentrations considerably below .5% (One Half Percent).  Do not add water to a PRO-pHx treated acid bath without first titrating to calculate the proper amount of acid and/or water required for proper acid strength.  In most circumstances the evaporation and drag out rates will exceed the volume of acid required for spike back.  If this does not occur, check to see if operators are adding water to the tank.  Dilution of acids may also occur if the dwell time over the pre-acid rinse exceeds the dwell time over the acid.   Spiking the acid bath regularly is necessary to maintain strong and clean acids.  Small amounts of new acid seems to reactivate the filterable results and maintains acids at optimum effectiveness.  Monitor tank to determine if the tank can have scheduled acids spikes, I.E. 10 G of acid each 3 days, each 5 days or each 10 days.  It is easier to calculate how quickly the PRO-pHx treatment is being consumed, if you can easily calculate the gallons of acid being spiked back into the tank.  When the acid and water spike back totals the tank volume, then add % (0.5%) of the tank volume of PRO-pHx to the acid bath to maintain the Effective Treatment Range of % to 1% PRO-pHx to acid.  I.E. When a treated 500 G bath (original treatment of 1% or 5 G PRO-pHx) adds 250 G of spike back acid and water, then replenish PRO-pHx at % (0.5%) total tank volume (add back 2 G PRO-pHx),.  This returns the total PRO-pHx treatment strength to 1%.  Find the filer size for your needs.  The micron size needed can vary from 1 micron to 75 micron with different metals compositions.  We see 5 & 10 micron being used most often, however, your filtration requirements may vary.  If the filter is not building a filter cake, then the filter size may be too large.  If the filter clogs immediately, then use a larger size micron.  Once a contaminated acid is treated with PRO-pHx and filtered clean, you may want to use a smaller micron for even cleaner acids.  Filter the in the range of 1 to 2 tank turnovers every hour or two.  (Rapid tand turnover, in the range of 4 to 5 times per hour, may act as a blender and build a foam on the surface.)  Determining the optimum filtration may take  a little experimentation.  Continuous filtration is highly recommended but not a necessity.  PRO-pHx is a time lapsed reaction.  Most results will not be seen for 1 to 3 days after adding PRO-pHx.  Metals dissolved today are most likely being filtered from the acid in 2 to 3 days not today.  Organics may show a reaction in 0 to 2 days.  Filter cake can vary from a paste to a gel and can vary in color from black to white and the texture may vary from granular to a thick sludge, depending on the contaminates removed.

Chromate Conversions Coatings    Chrome Plating Process    Cleaners    Copper Plating Process    Electroless Nickel    Black Oxide Process    Brass Plating Process    Nickel Plating Process

Phosphate Coatings    Pickling Salts    Room Temperature Blackening Process    Room Temperature Antiquing Process    Rust Preventatives Corrosion Inhibitors    Silver Plating Process

Specialty Products    Zinc Plating Process

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