I wanted to chime in here, as I brought this thread up to my mom who is a glass artist. There is some of this glass that you almost can't put a price on. All of these rods are referred to as "Gun Mounts", and is very big among pipe makers especially. Some are easy to work with, some are not. Like Monkythrowpoop mentioned, he has to see what is good and what is not. It could be a great color, but the properties of the glass aren't good. So, it's all an experiment.
So, my mom said "The white is the creamiest, easy to use white, no boiling issues, or at least not many. White in boro is a touchy." There was a specific mount made by corning a long time ago...60s-70s? These mounts were more squared and not rounded, and I think the color was referred to as "dwarf white (or white dwarf?)". This stuff is priceless. Some of these mounts have been found NOS in lots by people in the past.
"used in the production of television sets in the Fallbrook factory, Corning NY. sticks are about 4 inches long, 5mm wide, with a square profile"
There is a lot more info on this, and if I'm wrong on anything, please correct me.
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