Windshield repair is a permanent process that removes air from the break and displaces it with a curable resin that has the same light refraction index as the glass itself, or as close as possible, thus making the damage " virtually disappear". The process bonds the glass together, restores strength to the windshield, improves the damage's appearance and prevents the break from spreading further.
WINDSHIELD REPAIR TERMINOLOGY
ACUTE AREA: An area approximately 8.5" (21.59 cm.) high by 11" (27.94 cm.) wide directly in front of the driver and beginning just above the steering wheel.
ANSI TEST: A test designed by the American National Standards Institute.
ASTM TEST: A test designed by American Standards Testing Methodology.
BULLSEYE: A circular damage usually with a single impact point and no visible cracks
COMBINATION BREAK: Basically a Bullseye with a star in it. Sometimes this area can be crushed.
CRESENT CRACK: These usually look worse than they really are. It is a crack shaped as either a half moon or even a full circle. They range anywhere from 1 ½ long to 7 or 8 inches. These are also rather large and wide in appearance. These type of cracks generally fill in easily because of their width
DING: A term often used by the public to refer to a stone damage
FLOWERING: This usually happens when too much pressure is applied, or the laminate has broken down due to chemicals or heat. The resin runs between the laminate and the glass and bleeds out of the edge of the damage. You will hear more about this later.
HALF MOON: A damage also known as a partial bullseye
IMPACT PIONT: Where the debris ( usually a rock ) hit the windshield
LEGS: Short cracks that emanate from the break
PIT: The actual impact point from which a small piece of glass is typically missing
PRESSURE RING: Usually caused by too much pressure. Puts a distinct ring around the edges of the damage.
REFRACTION: The bending of light rays in passing from one medium to another
STAR BREAK: A damage that exhibits a series of short radial cracks or legs
STRESS CRACK: Usually comes from the edge of the glass with no impact point from a rock or other flying debris.
WING CRACK: This is usually a small crack with a slight curve to it.