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<p>[QUOTE="toomanytocount, post: 259227, member: 5115"]Funny, its several times recently I hear that verdigris is contagious from one metal surface to another, if there is copper in the metal composition or not. I always believed it showed the presence of copper, and the silver or gold surface was a finish or plating.</p><p><br /></p><p>This is the usual definition:</p><p><b>Verdigris</b> is the common name for a <a href="https://en.wikipedia.org/wiki/Green" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Green" rel="nofollow">green</a><a href="https://en.wikipedia.org/wiki/Pigment" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Pigment" rel="nofollow">pigment</a> obtained through the application of <a href="https://en.wikipedia.org/wiki/Acetic_acid" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Acetic_acid" rel="nofollow">acetic acid</a> to <a href="https://en.wikipedia.org/wiki/Copper" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Copper" rel="nofollow">copper</a> or the natural <a href="https://en.wikipedia.org/wiki/Patina" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Patina" rel="nofollow">patina</a> formed when copper, <a href="https://en.wikipedia.org/wiki/Brass" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Brass" rel="nofollow">brass</a> or <a href="https://en.wikipedia.org/wiki/Bronze" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Bronze" rel="nofollow">bronze</a> is weathered and exposed to air or seawater over a period of time. </p><p><br /></p><p>I have found with the many metal articles I have owned, jewelry and decorative items, this is true. High grade silver did not have verdigris on it, if it has corrosion it is usually grey or black with the blending in with the tarnish and patina of age. 833 grade is too high for verdigris, so not sure what this means about the bottle. Probably a silver plated copper hinged lid, with wear on the edges where the copper should peek through slightly.</p><p><br /></p><p>The lovely opaque green glass color and the ornate cap is very attractive. Early 20th in my opinion. Great piece to study for us. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie58" alt=":joyful:" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="toomanytocount, post: 259227, member: 5115"]Funny, its several times recently I hear that verdigris is contagious from one metal surface to another, if there is copper in the metal composition or not. I always believed it showed the presence of copper, and the silver or gold surface was a finish or plating. This is the usual definition: [B]Verdigris[/B] is the common name for a [URL='https://en.wikipedia.org/wiki/Green']green[/URL][URL='https://en.wikipedia.org/wiki/Pigment']pigment[/URL] obtained through the application of [URL='https://en.wikipedia.org/wiki/Acetic_acid']acetic acid[/URL] to [URL='https://en.wikipedia.org/wiki/Copper']copper[/URL] or the natural [URL='https://en.wikipedia.org/wiki/Patina']patina[/URL] formed when copper, [URL='https://en.wikipedia.org/wiki/Brass']brass[/URL] or [URL='https://en.wikipedia.org/wiki/Bronze']bronze[/URL] is weathered and exposed to air or seawater over a period of time. I have found with the many metal articles I have owned, jewelry and decorative items, this is true. High grade silver did not have verdigris on it, if it has corrosion it is usually grey or black with the blending in with the tarnish and patina of age. 833 grade is too high for verdigris, so not sure what this means about the bottle. Probably a silver plated copper hinged lid, with wear on the edges where the copper should peek through slightly. The lovely opaque green glass color and the ornate cap is very attractive. Early 20th in my opinion. Great piece to study for us. :joyful:[/QUOTE]
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