Here's an example of the same Maydwell 20 milkglass seen in the previous photo [id=137346450] after high levels of radiation and moderate levels of heat exposure. The darker verses lighter areas of brown still exist, but have weakened considerably. With controlled processing, any depth of color between those seen in the two photos is possible. You may note that the surface texture of the glass on this particular specimen took on a satiny, almost porous appearance after the heating process.
Courtesy of the NIA Altered Insulators Educational Program.