Gamblin PVA SIZE

Made from a pH neutral Polyvinyl Acetate Glue and distilled water. The size acts as a sealant for porous fibers of fabric or paper and isolates those fibers from gesso, ground and oil colors. This protects the fibers from acid, making the surface archival.

Conservation scientists recommend painters use neutral pH PVA instead of rabbit skin glue. PVA Size provides a stable size layer that seals the canvas but does not swell or shrink like rabbit skin glue does. Over time, the repeated movement of rabbit skin size can cause an oil paint film on top to crack. This does not happen with PVA Size because the size does not re-absorb atmospheric moisture.