A woodcut engraving depicting the production of saltpetre layers of calcium nitrate scrapings and lime mixed with wood put in a vat and water trickled through it. Liquor collected at the bottom. If not judged strong enough it was poured through a second vat, then boiled down and set in pans to crystallise. Dated 16th century

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Details

Creative#:

TOP25302559

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

No

Property Release:

No

Right to Privacy:

No

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