Lascaux Acrylic Size
The above are two examples of synthetic materials that can be used in place of animal based sizes. Although they are intended for use in acrylic based systems they can be used in conjunction with commercially produced oil primers although it is advisable to use acrylic primers over acrylic sizes.
PVA is prone to deterioration and should be avoided.
Acrylic priming systems are easier to use; unlike traditional materials, their properties are predictable, strengths do not vary from batch to batch and the entire process is speeded up.