IEDs are not manufactured by any fixed standards, therefore their materials of construction, composition of ingredients varies widely. Everything depends upon the availability of resources, knowledge and skill of user.
• Explosives composition
• Various ingredients include the various combinations of oxidizer and fuel. For example:
1) Potassium chlorate + Arsenic sulphide + missiles (iron nails, glass pieces , stone chips etc.,) - Throw-down device.
2) Potassium chlorate + sugar initiated by conc., Sulphuric acid - Acid bomb
•Improvisation can be made on container, main charge, initiation device and projectiles depending upon the availability, skill, motive and means. For example:
Container; Tiffin carrier, transistor, cement pipe, iron pipe, telephone, Television, toys, cell-phone, computer, scooter, cycle, the articles which are easily available to the anti social elements. ( ref1 ,2&3)
•Main charge : High explosives, Low explosives or combinations.
•Initiation device: Time device, remote device and impact device, battery operated etc.
•Projectile & Missiles: Iron nails, glass pieces, stone ships, ball bearing, generally used in throw down improvised devices.
•Factory made ammunition:
•In case of factory made ammunition, these are manufactured according to standard specifications. The ammunition bear factory name, batch/ lot no., year of manufacture etc.
•Some of the explosive composition commonly used in factory made ammunition are listed below.
•Composition B (60% RDX, 40% TNT plus wax)
•Cyclotol (60-75 % RDX, 25-40% TNT)
•Torpex 2 (42% RDX, 40% TNT, 18% Al)
•Composition C4 (91% RDX, 9% plasticisers)
•Picratol (TNT + ammonium picrate)
•Tritonal (TNT + aluminium powder)
•C1: RDX + Plasticizer
•C2: RDX+TNT +DNT + MNT +NC+Dimethyl Formanide
•C3: RDX+TNT+DNT+MNT + Tetryl+NC