Briska detonator

In practice detonators of increased strength are made by increasing the weight of the base charge rather than by other means. The only important exception to this is the German Briska detonator (see p. 103). 

Briska detonator. A detonator in which extra power is achieved by extremely heavy pressing of the base charge. 

Abel Heat Test at 82.2° — 3 mins (NG 10 mins) Friction Sensitivity — very insensitive Impact Sensitivity — very insensitive Initiation by Detonators — incomplete with No 8 Briska Detonator in Trauzl Test Power by Ballistic Mortar — 62% Blasting Gelatin, which.corresponds to about 110% TNT Power by Trauzl Test — 106% TNT Thermal Stability at 120°— no brown fumes after 5 hours... 

BRISKA Detonator with a force equivalent to 0.8 g of PETN... 

According to an investigation by Medard (Ref 3)rmixts of Mg + H,0, Mg + MeOH or 2A1 + 3H,0 are comparable in their power to guncotton but they are not able to propagate the deton unless a small quantity of a sensitizer (such as 7%+of PETN) is incorporated. For instance, the mixt oontg Al (powder) 30, H,0 30 and PETN 40% has a vel of deton of 5140 m/sec at d I.55, coefficient d utilization pratique (CUP)(French Trauzl test value) 119(PA 100), and may be detonated by a Briska primer. It is practically insensitive to shock but its exudation, as detnd by the method of Burlot,... 

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