How exactly are oil-prepared canvases made?

Claessens takes the greatest care in producing its oil-prepared canvases. Synthetic glue, which is less sensitive to humidity, is used rather than hide glue. We have not used white lead for many years, in accordance with Belgian and European legislation. The coating itself consists of an oil paint, linseed oil as a binder and chalk, zinc white or titanium white as grounds and pigments.