Method and system of using gradual drying in multi-material 3D printing

A three-dimensional (3D) printer, comprising:

• a receiver device;
• a plurality of material deposition units, each material deposition unit configured to deposit a material onto the receiver device, the plurality of material deposition units configured to form a printed layer on the receiver device and the material including a particulate material and a liquid vehicle;
• a material removing system that receives the printed layer from the receiver device, the material removal system including a plurality of extraction units for gradually removing the liquid vehicle from the printed layer, the plurality of extraction units including at least one extraction unit that applies back pressure to release the printed layer from the at least one extraction unit;
• and
• a delivery system that receives the printed layer from the material removal system and transports the printed layer to a build platform.