Tiny bubbles that appear on the surface of painted or lacquered pieces. On paintings and painted furniture blisters are usually caused by the piece being stored in damp, poorly ventilated areas. On varnished furniture the reverse is true. Blister on wood are generally caused by excessive dryness.
Bubbles that may appear on the asphalt roofing materials after they are installed.
A raised spot or bubble on the surface or a separation between layers, usually forming a void or air-filled space in the vulcanized article.
A raised spot on the surface of the hose - usually containing air - sometimes referred to as voids or bubbles.
Air bubbles trapped between film and mesh.
A bubble on the outside of the part.
A profusion of bubbles or gaseous inclusions in glass. Small bubbles less than 2mm diameter are referred to as seeds.
Blisters are small, bubble-like formations which appear on both sides of the web in exaxtly the same area, primarily in areas of heavy ink coverage. Excessive moisture cannot escape because the ink coverage traps it.
Soft raised or puffed spots appearing on siding where paint was improperly applied. Also may be seen on roof covering that was improperly installed.
Bubbles that may appear on the surface of asphalt roofing.
The more evident and serious blisters are structural blisters. They are caused by the expansion of trapped air and water vapor or other gases. Air and moisture trapped within the construction tend to expand during a rise in air temperature of from the heat of the sun. This expansion causes the plies of the roofing to seperate and bulge the roof surface in a balloon effect.
Surface bumps on the O-ring caused by an air pocket or internal void.
A raised spot on the seal's surface created by an internal void, or air-filled pocket.