Performance & Specification Terms

The measurable properties that decide whether a medium suits a job: peel strength, opacity, basis weight and the indoor/outdoor durability ratings they feed into.

Peel Strength

The force required to peel a self-adhesive film from a standard test panel at a defined angle and speed, reported in g/25mm (or N/25mm). ZST specifies 180° peel strength: removable media typically measure single digits to tens of g/25mm, while strong-adhesive films reach 1000 g/25mm or more.

Dimensional Stability

A film's resistance to shrinking or expanding with temperature, humidity and ageing, typically measured as dimensional change after conditioning. High dimensional stability (e.g. ≤0.1 in) keeps multi-panel graphics aligned and prevents edge curl or gaps over the graphic's service life.

GSM (Grammage)

Mass per square metre of the film or paper, in grams (gsm). Film weight plus liner gives total weight. Higher gsm usually means a stiffer, more opaque sheet that is easier to handle; ZST publishes both film weight and total weight on each model page.

Film Thickness

The thickness of the printable film (not including liner), in micrometres (μm), often written with a tolerance such as 140±9. Thicker films feel more rigid and hide the surface behind them; thinner films are more conformable. Paper series list grammage instead of film thickness.