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post #160 of (permalink) Old 06-21-2019, 07:49 AM Thread Starter
zulu
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Location: Cypress, Texas
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Quote:
Originally Posted by GGaskill View Post
That will bleach out quickly in the San Antonio sun.





George,
That is exactly what happened to this color historically.


This was pulled from a Spanish Ordnance manual by the Curator of the Alamo and sent to me.
Zulu


"The Spanish painted their ordnance in a blue grey and not as some authors think grey. The pigment was cobalt blue and when exposed to the weather for years it has a tendency to fade to a grey. The cobalt blue was derived from cobalt oxide mined in southern Spain that was sintered with silica (sand) at 1200 C. It was a very stable colour and was popular too in the Spanish Naval Regulations from 1772. The metalwork was painted black. "

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