Formulary for Pt/Pd Printing

Ferric Oxalate Solution (25%)

Solution A:

• 25 gm ferric oxalate powder
• 2 gm oxalic acid – may increase printing speed and Dmax
• 88ml distilled water at room temperature
• stir constantly until solids have completely dissolved (~8 hours)
• add distilled water to bring to 100ml if necessary

Solution B:

• add 0.6% potassium chlorate to Solution A (e.i. 0.6 gm to 100 ml, or .15 gm to 25 ml)

Platinum Solution (20% Potassium tetrachloroplatinate) (K₂PtCl₄)

• 80 ml distilled water @ 100°F
• 20 gm potassium chloroplatinite
• distilled water to 100 ml

Palladium Solution (15% Sodium tetrachloropalladate) (Na₂PdCl₄)

• 80 ml distilled water @ 100°F
• 7 gm sodium chloride
• 10 gm palladium chloride
• distilled water to 110 ml

“Na2” Platinum Solution (20% Sodium hexachloroplatinate) (Na₂PtCl₆)

• 20 ml distilled water @ 100°F
• 5 gm sodium hexachloroplatinate
• distilled water to 25 ml

Potassium Oxalate Developer (25-35%)

• 800 ml distilled water @120°F
• 250-350 gm potassium oxalate
• distilled water to 1 liter

Ammonium Citrate Developer (25%)

• 800 ml distilled water @ 68°F
• 250 gm ammonium citrate
• distilled water to 1 liter

EDTA/Citric Acid/Sodium Sulfite Clearing Bath

• 1 liter water
• 1 tbsp EDTA (tetrasodium)
• 1 tbsp Citric Acid (C₆H₈O₇)
• 1 tbsp Sodium Sulfite (Na₂SO₃)