bon à tirer
The left-hand column of the table [on page 34-35 of the article], Stage, is devoted to the general distinction between Avant-texte and Text. A horizontal bar cuts right across the table at the level corresponding to “Bon à tirer” in the column headed Document Type, the decisive moment when what had been in a pliable and mobile manuscript state up to that point becomes fixed in the frozen shape of a published text. Everything above this dividing line belongs to the pre-textual domain and is a matter for manuscript genetics (or pre-textual genetics), while everything below belongs to the textual domain and is the province of textual genetics.
(Biasi 1996, 37)