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Lead white powder has been made for more than 2000 years and basically the same way.
You take a thin sheat of lead and roll it loosely to fit into a ceramic pot. The buttom of the ceramic pot is filled with vinegar or acetic acid and the lead roll stand on something so that it don't dip into the vinegar.
The vapour from the vinegar attack the lead and erode it. To promote the process the ceramic pot is placed into a heap of farmyard manure that will produce heat around 40 - 50 degrees Celcius for 4 - 6 weeks. The manure also produces carbon acid that helps the eroding process.
This process was going on in big scale with many pots and in small rooms so that the acid could work on the lead.
The lead will turn into white powder and only a thin core of lead will be left.
What we need is: lead, ceramic pot, acetic acid / vinegar, carbon acid, heat 50 degrees and a box around 1 cubic meter.
Any suggestions?
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