Hydraulic 3d-printing system and method

A method for printing three-dimensional objects, comprising the steps of:

• (a) moving a piston inside a chamber of a container assembly, the container assembly adapted to hold one or more printing materials and to print a three-dimensional (3D) object;
• (b) transferring at least a portion of the printing material stored at least partially in the chamber to a printing area between a surface of a window and a platform, wherein movement of the piston inside the chamber hydraulically actuates the platform;
• (c) emitting a curing light through the window to cure a layer of the printing material to the platform or to a previously cured layer of the printing material already cured onto the platform;
• and
• (d) repeating steps (a)-(c) until the 3D object is formed, wherein moving the piston inside the chamber of the container assembly includes releasing a spring of the container assembly that actuates movement of the piston.