Process for three-dimensional printing, particularly for the production of windows, plate-shaped elements for floors or the like, which comprises: - at least one supply step of PVC and of at least one solvent in which said PVC is soluble; - at least one mixing step of said PVC and of said solvent to obtain at least one mixture in the liquid phase; - at least one distribution step of said mixture onto at least one deposition surface; - at least one evaporation step of said solvent for obtaining at least one layer of PVC of at least one manufactured article, said evaporation step being subsequent to said distribution step; and - repeating said distribution step and said evaporation step to obtain a plurality of said overlapping layers of PVC forming said manufactured article; wherein said distribution assembly is housed in a booth in controlled atmosphere, which prevents the dispersion of toxic vapors of the evaporated solvent during the processing phases and in such a way as to protect the operators from any intoxication; wherein said process comprises at least one supply step of at least one distribution assembly comprising: - at least one distribution head of said mixture onto said deposition surface; - at least one removal and recovery system (7, 8) of said evaporated solvent; characterized in that the distribution assembly further comprises - at least one mixing unit of said PVC and of said solvent; wherein said evaporated solvent is recovered through said removal and recovery system (7, 8), which, by means of an extraction hood, extracts the air in said booth and, through a recovery unit, collects said evaporated solvent, sending it back to said mixing unit. - at least one supply step of PVC and of at least one solvent in which said PVC is soluble; - at least one mixing step of said PVC and of said solvent to obtain at least one mixture in the liquid phase; - at least one distribution step of said mixture onto at least one deposition surface; - at least one evaporation step of said solvent for obtaining at least one layer of PVC of at least one manufactured article, said evaporation step being subsequent to said distribution step; and - repeating said distribution step and said evaporation step to obtain a plurality of said overlapping layers of PVC forming said manufactured article; wherein said distribution assembly is housed in a booth in controlled atmosphere, which prevents the dispersion of toxic vapors of the evaporated solvent during the processing phases and in such a way as to protect the operators from any intoxication; wherein said process comprises at least one supply step of at least one distribution assembly comprising: - at least one distribution head of said mixture onto said deposition surface; - at least one removal and recovery system (7, 8) of said evaporated solvent; characterized in that the distribution assembly further comprises - at least one mixing unit of said PVC and of said solvent; - at least one distribution head of said mixture onto said deposition surface; - at least one removal and recovery system (7, 8) of said evaporated solvent; characterized in that the distribution assembly further comprises - at least one mixing unit of said PVC and of said solvent; wherein said evaporated solvent is recovered through said removal and recovery system (7, 8), which, by means of an extraction hood, extracts the air in said booth and, through a recovery unit, collects said evaporated solvent, sending it back to said mixing unit.