OXBLOOD: (TAG-104-05) A self-striking dark grey/brown rod that can make at least three colors when flameworked. It oxidizes to black, reduces to a grey, and, with super-heating and further reduction can produce subtle terra-cotta and brick reds. Very earthy. Also makes a good base for silvered colors. Rods are 20 inches long. This glass is around 15 years old and no longer manufactured.