[Terrapreta] pulverizing charcoal

[Chuck Yokota]

Are you using "lump charcoal" and not the briquettes?  "Charcoal"
briquettes are a mixture of several ingredients, and is not comparable
to real char.

David Yarrow wrote:

later this week, i will repeat this with a bag of comercial hardwood 
barbeque charcoal.  i'll get another bag of commercial charcoal and try 
soaking batches in various solutions, including fresh water, sea mineral

water, EM water, compost tea, and urine to compare how quickly the char 
absorbs water and becomes easy to crush.