The fracturing or rupturing of a coating film caused by escaping gases or water vapor trapped under the surface.
Usually refers to a fairly uniform distribution of small blisters caused by the volatilization of entrapped solvent beneath a topcoat that has started to cure. The volatile material can be from the sealer coated or from a layer of paint that is excessively thick.
A film defect in the form of a bubble resulting from the expansion of material in the plaster substrate due to their hydration.
A paint defect characterized by raised bumps in the surface. Caused by solvent vapor forming within the paint after it has begun to skin-over. The resulting vapor pressure raises the paint surface at its weaker spots.