Brown Patina Conversion

[Breck Gorman]

http://www.morana-rtd.com/e-preserva...30-12-2012.pdf

Queen Victoria’s coronation gown. Once in 1837 a rich black silk, but over time and exposure turned to a mottled brown. Very similar process to what happens to barrels. Common denominator, logwood dye.

Brits recommend that their best barrels get re-blacked every couple years.

[Drew Hause]

Breck: I've done chemical composition on 3 Crolle samples and 1 Twist sample by Optical Emission Spectroscopy (OES), and they were non-standard AISI 1002 - 1005 low carbon steel. This would suggest that the iron component was wrought iron and the steel was very low carbon “mild” steel.

re: coloring. Steve Culver's thoughts are here
https://docs.google.com/document/d/1...g51u_SnEM/edit

[jeffery c]

Originally Posted by Breck Gorman

http://www.morana-rtd.com/e-preserva...30-12-2012.pdf

Queen Victoria’s coronation gown. Once in 1837 a rich black silk, but over time and exposure turned to a mottled brown. Very similar process to what happens to barrels. Common denominator, logwood dye.

Brits recommend that their best barrels get re-blacked every couple years.

Interesting to read that. We're at least getting a handle on our own more recent history. I remember reading when they started bringing up longbows and staves from the Mary Rose that there was not a single longbow in the UK preserved from the time of their period of use as a military weapon. Our ancestors will be in better shape regarding Parkers at least.