Making Silver Powder from Silver Chloride
Reducing Silver Chloride to Silver Powder - Iron method
Equipment required:
Clean Cast Iron Skillet or Cast Iron Dutch Oven
PH test papers or pH meter
5 Coffee Filters
2 - 5 Liter glass beaker or rugged glass container
Strong, flexible Teflon Spatula

Prepare using the following proportions:
   100 grams Silver Chloride - (We sell Silver Chloride if you need some)
   350 ml Water - (Tap water is O.K. - else use Distilled Water)
    87 ml Sulfuric Acid - H2SO4 (96% - 18 Molar)
Yield: 75.21 grams Silver Powder for every 100 grams of Silver Chloride.

Grind the Silver Chloride to as fine a powder as possible. The finer the better.
Using sandpaper, sand the interior of a cast iron skillet or dutch oven to expose fresh iron metal.
Rinse the cast iron container thoroughly under running water.
Add the Silver Chloride, Water and Sulfuric Acid to your cast iron container.

    1 - Warm the cast iron container to about 60°C (140°F - like coffee water temperature).
    2 - Stirring with a spatula, dissolve as much as the Silver Chloride as possible (~30 mins).
    3 - Pour off the entire liquid and powder into a clean 2-5 Liter glass jar.
    4 - Rinse/Drain with very hot tap water until the ph of the water is 7.
    5 - Add enough Ammonia (28% - very strong!) to cover the Silver Powder.
    6 - Stir often, wait till any undissolved Silver Chloride is dissolved (~30 mins).
    7 - Rinse/Drain with very hot tap water until the ph of the water is 7.
    8 - Add enough HCL (Hydrochloric Acid - 37%) to cover the Silver Powder.
    9 - Stir often, wait for any iron to be dissolved (~30 mins).
  10 - Rinse/Drain with very hot tap water until the ph of the water is 7.

Stack 5 Coffee Filters together, pour out your powder into this sturdy filter packet.
Dry your filter/powder for at least 24 hours at room temperature. (break up lumps every 12 hours)
NOTES:
1: The Silver Chloride reduces easier after it has been ground into a fine powder.
2: Your iron container should be sanded with sandpaper to the bare iron metal.
3: This method produces what is called 'Cement Silver' powder.
     (because it resembles the color of cement used in making concrete.)
4: If you use reagent grade chemicals and very hot water, your purity will be 99.+
5: This is NOT the method we use to make our Silver Powder for sale.
     We use a mix of NaOH and Hydrazine -- for purity and grain size.