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My Good Babushka

(2,710 posts) Tue Jul 1, 2014, 06:00 AM Jul 2014

Bideford Black

In Bideford, UK, a unique pigment called Bideford Black was mined for over 200 years, until 1969. The deposits were formed 350 million years ago in the Carboniferous Period. It contains carbon, silica, and aluminum. It was used in paint and mascara and was called "The Mother of Coal".

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Bideford Black (Original Post) My Good Babushka Jul 2014 OP

Thanks, now I'm going to do some research about this intaglio Jul 2014 #1

intaglio

(8,170 posts)

1. Thanks, now I'm going to do some research about this

Reply to My Good Babushka (Original post)

Tue Jul 1, 2014, 06:42 AM

Jul 2014

Never heard of it before!

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