Gesso’s traditionally are supposed to have some tooth or texture in order to provide better adherences for the paint.This is very important when using oil paints on an acrylic base.

Gesso is suppose to prevent all of the medium, traditionally linseed oil from being absorbed into the underlying support

Before the 1950’s all gesso was made from animal glue. Since the 50’s acrylic gesso has largely replaced animal glues.