I believe the word "tankwash" is also being used by some people specifically in reference to Jabo marbles to define a specific amount of how much glass was put through the machine during a session of marble making. For example, a "run" of Jabo marbles would define a ton or more of glass used in a session of making marbles, a "tankwash" would define 201-1999 pounds of glass put through the machine during a session of making marbles, and a "test" would define 200 or less pounds of glass put through the machine during a specific marble making session. This terminology is not widespread yet, but quantifiable definitions of marble terms specific to Jabo marble making would be benefitial to future Jabo collectors. Quantifiable definitions of all applicable marble terms would be helpful to all collectors and sellers. People jump all over sellers for misusing terms like "rare," "vintage," and "antique" and yet the same people won't put a number to go with a definition.