All about glass > BRS bullet resistant glass classification

Our Bullet resistant Plastofloat is tested and rated according to European standard EN 1063 specifications from BR1 to BR7 according to its ability to withstand armed attack using a particular weapon, not just by stopping the bullets, but also in terms of the spall ejected on the opposite face.
To be rated BR, the glass must withstand 3 impacts without being perforated. The test is always performed successively on three samples of the same glass. The resistance level is determined by the type of weapon, the ammunition used and the shooting distance.
 

EN 1063 Class	Plastofloat	weapon used	Calibre	ammunition used	Shooting distance in m.	Impact velocity in m/s
BR 1S	PRE 10R, PRE 15, PRE20	gun / rifle	22 LR	cylindro-ogivale plomb	10	360
BR 2S	PRE 22	Handgun	9 mm luger	cylindro-ogivale plomb chemise acier plaqué	5	400
BR 3S	M 240	Handgun	0,357 magnum	conique plomb chemisé acier plaqué	5	430
BR 4S	M280, M335, M338	Handgun	0,44 rem mag	cylindro-conique tronquée plomb chemisé acier	5	440
BR 5S	M335, M386	gun / rifle	5,56 X 45	cylindro-conique plomb masse pénétrante acier chemisé acier	10	950
BR 6S	M 475	gun / rifle	7,62 X 51	cylindro-conique plomb chemisé acier plaqué	10	830

For example PRE 10R stops a 22 LR shot from a distance of  10 metres with a gun/rifle, and is rated BR1. However, the violence of the impact may cause spall to be ejected on the side opposite the shot, so PRE 10R does not guarantee the protection of people located just behind the glass. It is rated  BR1S. (Bullet Resistance with reduced Spall)
If you want to guarantee the safety of people located behind the glass, you must choose bullet-resistant glass rated NS, that is to say bullet resistance with No Spall