Home Glass Chemistry Reactive Glass

           Reactive Glass

Glass that has metallic elements from the periodic table in them

sometimesreact with each other to make another color.



Some of my favorite glass for marble making is silver glass. By that

I meanglass that is infused with silver. And that silver cause

chemical reactions.  Those reactions translate to fusing or kiln

forming glass.



When silver and sulfur get together good things happen. When copper

and sulfur get together more good things happen.



The meeting of the glasses causes color changes or in the instance of

turquoise and ivory or French vanilla a ring or brown or black outlines

wherever the glass meets.



Sky blue and ivory or dark ivory make a black line between them.


When two glasses come into contact during heating and create a third

color, specific ingredients in the two “reactive” glasses almost always

cause this reaction. The most common ingredients, which lead to a

reaction are: sulfur,selenium, copper, lead, and silver. As the chart below

illustrates, reactions between these ingredients tend to fall into seven

main categories.




........................Sulfur..........Selenium........Silver



Copper................X ..................X



Lead....................X...................X..................X


Silver...................X....................X

...................X indicates a reaction between the two ingredients..................



Here is another way to look at the reaction combinations:



1. Copper - sulfur reaction



2. Copper - selenium reaction



3. Lead - sulfur reaction



4. Lead - selenium reaction



5. Lead - silver reaction



6. Sulfur - silver reaction



7. Selenium - silver reaction



Below are photographs of marbles that have reducing colors.  There

were NO black or dark glass nor white glass used whatsoever in

making these marbles!