A fire broke out during the assembly of a batch of fireworks. The pyrotechnic composition was based on a pulverine sodium oxalate, antimony sulphide and aluminium. The operation consisted of closing the firework by a cardboard disc and then compressing it by means of a manual press. The fire spread to a portion of the elements present at the workstation. In following the protocol, the technician immediately left the premises and alerted emergency response teams; he was unharmed. The machinery on the premises was degraded. The station’s cleanliness and organisation helped limit the extent of damage and speed of fire spreading. The operator decided to widen the screens in order to improve their efficiency.