Abstract: A composition generating an IR-opaque smoke in the form of a compact which has a density in the range from 0.9 to 1.5 g/cm.sup.3 is described, comprising from 10 to 25 percent by weight of magnesium powder, from 5 to 35 percent by weight of a fluorinated organic poller, from 5 to 15 percent by weight of chloroparaffin and from 35 to 65 percent by weight of an aromatic compound of the formula I ##STR1## wherein A and B are independently selected from ##STR2## R.sup.1 and R.sup.2 are independently selected from OH, X or alkyl having one to four carbon atoms,m and n is an integer from 0 to 2, andX is halogen,or an aromatic compound of formula II ##STR3## wherein R.sup.1 and R.sup.2 X m and n are defined as above and D and E are independently selected from ##STR4## or phtalic anhydride, 2-benzoyl pyridine, fluorene, dibenzosuberenone or diphenylenesulphide or the derivatives thereof substituted by R.sup.1.sub.m and/or R.sup.2 .sub.m.

Abstract: A projectile is described which consists of a contact head and a screen material canister which may be made of aluminium, attached thereto by bolts and, optionally closed with a cover. Contact rings are arranged on an outer casing of the contact head and are connected via firing leads to a primer capsule which is located in the contact head in a centrally disposed box-shaped charge chamber having a substantially gas-tight screw cover at its base and substantially gas-tight ports for the firing leads, the ports being sealed with a sealing agent.