PDA

View Full Version : Reaction Question


Scott Novota
06-01-2018, 11:39 AM
As most everyone knows these days you get a cream reaction when using Ruby Red with a silver based color. Some of them work better than others but universally it seems that any silver based transparent will yield the reaction over a copper ruby red.

I did not want to go into a list of colors that work and don't work just ask the question. What exactly is causing the reaction. Is it the copper and the silver? It is something specific to the Copper Ruby Red that is causing the reaction that is not copper?

The reason I am going down this road is that I would like to expand on the base color that causes the reaction. I have only ever found Ruby Red to react with the cream at contact site with silver. I have found colors that will react and create a red ring, or a black ring, but never a cream one.

I am curious because making a "new" base color to use instead of the Ruby Red for the reaction is my goal. I have the supplies, I have the means, I just don't know this specific chemistry going on here. Could we make a Orange/green/amber/black or a clear that would react like Ruby Red does with silver?

Pete VanderLaan
06-01-2018, 01:48 PM
you need to go back to the periodic table of the elements and take a look at the placements of Copper, Silver, and Gold. All bunched up in a stack. There's reasons. Now read a basic chemistry book.

When I used to make copper rubies, I actually just rolled the gather into silver nitrate and cased in clear and got pretty much the same kind of reaction, sometimes blue and creamy outline. Usually blue. Silver is very influential on gold glasses making them depart from traditional wine reds to colors like motor oil, Iris gold, lots in that vein.

When silver gets added to fluorine opaques it almost inevitably turns gray and is unattractive. I do not know why that would be. I don't know what might occur if you were to overlay copper ruby frit on that. I've never tried. The gray was quite bad enough.
Silver is remarkable in that it now has been demonstrated that it can make every color in the spectrum. No other metal ( or atom) can do that. What to me is even more remarkable is how little rigorous research has been done on coloring with it. Weyl and Volf essentially dismiss it largely because it is so flaky and that scares industry off.
But as to more materials that will create a reactive chain, I doubt it beyond cadmium and lead. Look at that little section of the element chart. It's small.

Perhaps having a clear that is not oxidized cased in a silver might have an interesting effect. I don't know.