What does the French term "bon a tirer" (BAT) signify in printmaking?

The term "bon a tirer" (BAT) in printmaking translates to "good to pull" and signifies that the proof has been reviewed and approved by the artist or printmaker for the final printing run. This approval indicates that the print is ready for production, and the artist is satisfied with the quality and colors used in this proof. The BAT serves as a benchmark for the edition, meaning subsequent prints produced will closely match this approved version.

In contrast, the other options describe different scenarios in the printmaking process. A print that has been altered or corrected does not hold the same finalized status as a BAT. The first print in an edition typically refers to an early state but it is not necessarily approved as final. Demonstrations of different printing techniques would not have the same connotation as BAT, which is specific to the approval status of a print rather than teaching or experimentation.