Step 1: Define stencil techniques in printmaking. These techniques involve passing ink through a cut-out or blocked-out matrix (the stencil) to form an image.
Step 2: Analyze the options.
Silk screen (Serigraphy) is the quintessential modern stencil technique.
Pochoir is a direct, hand-stenciling method.
Squeezee (often misspelled as Squeeze) is the tool used to push ink through the stencil in silk screen printing, so it is inherently part of the stencil process.
Photogravure is a photo-mechanical intaglio process. It involves etching a photographic image onto a plate and printing it like an etching. It is not a stencil technique.
Therefore, Photogravure is the correct answer as it does not belong to the stencil family.