Electro-photographic 3-D printing using dissolvable paper

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

• an intermediate transfer belt (ITB);
• a first photoreceptor positioned to electrostatically transfer a first material to said ITB;
• a second photoreceptor positioned to electrostatically transfer a second material to a location of said ITB where said first material is located on said ITB, said second material dissolves in solvents that do not affect said first material;
• a platen moving relative to said ITB;
• a sheet feeder positioned to feed sheets of media to said platen, said platen moves toward said ITB to have a sheet of said media positioned on said platen repeatedly contact said ITB, said ITB electrostatically transfers a layer of said first material and said second material to said sheet each time said platen contacts said sheet with said ITB to successively form layers of said first material and said second material on said sheet, said layer of said first material and said second material is on a discrete area of said ITB and is in a pattern;
• a heater adjacent said platen, said platen moves to said heater after each time said ITB transfers each of said layers to said sheet to independently heat each of said layers and successively join each said layer to said sheet and to any previously transferred ones of said layers on said platen;
• a rinsing station positioned to receive, from said platen, said sheet having thereon said layers, said rinsing station applies a liquid to dissolve said sheet and leave a freestanding stack of said layers;
• a platform positioned to receive, from said rinsing station, said freestanding stack to successively form a 3-D structure of freestanding stacks of said layers;
• and
• a bonding station positioned to apply light and/or heat to said 3-D structure to bond said freestanding stacks to one another on said platform.