Vicky...........in 1878

newbiecollector

I love this coin. Not a suprememo example but has character for me.

It seems to have something on it. I have looked close with a loupe and I am sure it isn't the old bad PVC greenie, but I'm not sure what it is.

ps: can you tell from my photo if the 1 looks a bit strange? Does to me

theboz11

Verdigris is the common name for the green coating or patina formed when copper, brass or bronze is weathered and exposed to air or seawater over a period of time. It is usually a basic copper carbonate, but near the sea will be a basic copper chloride.[1] If ethanoic acid is present at the time of weathering, it may consist of copper(II) acetate. Its name comes from the Middle English vertegrez, from the Old French verte grez, an alteration of vert-de-Grèce ("green of Greece"). The modern French spelling of this word is vert-de-gris.

The vivid green color of copper(II) acetate makes this form of verdigris a very common pigment. Until the 19th century, verdigris was the most vibrant green pigment available and frequently used in painting. Verdigris is lightfast in oil paint, as numerous examples of 15th century paintings show. However, its lightfastness and air resistance is very low in other media. Copper resinate, made from verdigris, isn't lightfast, even in oil paint. In the presence of light and air, green copper resinate becomes stable brown copper oxide. This degradation is to blame for the brown or bronze color of grass or foliage in many old paintings, although not typically those of the "Flemish primitive" painters such as Jan van Eyck, who often used normal verdigris. In addition, verdigris is a fickle pigment requiring special preparation of paint, careful layered application and immediate sealing with varnish to avoid rapid discoloration (but not in the case of oil paint). Verdigris has the curious property in oil painting that it is initially bluish-green, but turns a rich foliage green over the course of about a month. This green is stable. Verdigris fell out of use by artists as more stable green pigments became available.

newbiecollector

Thanks Boz I knew some of that but it doesn't look like the sort we see so much when a coin has benn in a PVC holder....and this one isn't.

ps: You think Vicky will understand all that if I talk slow?

theboz11

That coin does not appear oily or poisened by PVC. Either way, Give it a Acetone bath, as described here before. If it is not too severe, it will come off and not turn Black.