"Undrilled copper panels. They etched for over an hour in ferric chloride, then were patinated with liver of sulphur (which is still active and darkening the metal, actually).
Photo: Shikhee"
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Note: comments that insult people will be removed. Critique on gear is allowed. Do not ask if listings are still available. Click through auction links to check yourself. Posts and pics remain for historical purposes. To reduce spam, comments for posts older than one week are not displayed until approved (usually same day).