The Detonators consist of an Aluminum shell filled with required dosage of PETN as base charge and mixer of Nickel Hydrazine Nitrate and Aluminum powder(ANHN MIXTURE) AS PRIMING CHARGE.anhn mixture is sensitive to flame while PETN is sensitive to the shock wave generated by ANHN mixture. In delay detonators a pyrotechnic element is placed above the ANHN mixture,which provides the required delay.