This process for manufacturing an object by solidifying a powder (P) includes steps of: a) depositing a powder layer (P) on a working zone (Z); b) compacting this layer; c) solidifying a first zone (7) of the compacted layer using a laser; d) solidifying at least one second zone (11, 12, 13) of the compact layer, this second zone (11, 12, 13) making contact with the zone (7) solidified in step c), under solidifying conditions chosen so that this second solidified zone (11, 12, 13) is less strong than the first solidified zone (7); e) repeating steps a) to d) until the object (1) is obtained; and f), after step e) and when the object (1) is finished, removing the second zones (11, 12) with respect to the first zones (7).