uphillbothways, 10 months ago Red and blue glass were made with lead and cobalt I think.... They were notable for their bright lasting colors, frequently used in pigments, and it wasn't known until much, much more recently that they were horribly toxic over the long term.
Red and blue glass were made with lead and cobalt I think.... They were notable for their bright lasting colors, frequently used in pigments, and it wasn't known until much, much more recently that they were horribly toxic over the long term.