Method for the additive manufacturing of a silicone elastomer article

A method for additive manufacturing of a silicone elastomer article and a support using a 3D printer, selected from an extrusion 3D printer and a 3D jetting printer, said method comprising:

• 1) printing at least one part of the support with a support material composition V;
• 2) Printing at least one part of a crosslinkable silicone composition X precursor of the silicone elastomer article;
• steps-1) and 2) being done simultaneously or successively, and when 1) and 2) are done successively, 1) can be performed before 2), or 2) can be performed before 1);
• 3) optionally repeating 1) and/or 2);
• and
• 4) allowing the crosslinkable silicone composition X precursor of the silicone elastomer article to crosslink, to obtain a silicone elastomer article;
• wherein said support material composition V comprises:
• between 3 wt. % and 30 wt. % of at least one nanoclay, and
• at least 50 wt. % of water.