Multicolour cermet and/or ceramic article and manufacturing method thereof

A multicolour ceramic and/or cermet article with a relief decoration (11) of a colour distinct from the rest of the article, said article being obtained with a manufacturing method comprising:

• providing a first material (2) and a second material (3), said first material (2) being distinguished from the second material (3) by its colour, said first (2) and second (3) materials being either a ceramic or a cermet;
• providing a mould (5) with a pattern cavity (6) comprising a portion (7) including a relief or hollow structure configured to form a hooking surface on the first material (2) after injection;
• injecting said first material (2) into the pattern cavity (6) provided with the portion (7) so as to print the structure on a portion of the first material (2) and thus form the hooking surface on said portion;
• injecting the second material (3) onto the first material (2) at least at the hooking surface to form a green body (8);
• sintering the green body (8) to form a movement-blank;
• machining, by laser ablation, the second material (3) on the green body (8) or on the movement-blank to make the relief decoration (11), said second material (3) being hollowed out by laser ablation at least to the first material (2) to reveal said first material (2) and obtain the relief decoration (11) in said second material (3) standing on the first material (2);
• finishing the movement-blank to obtain the article,
• wherein the relief decoration (11) is formed in one piece with the rest of the article, said decoration (11) as well as the rest of the article being tinted in the mass with a uniform colour for each colour, and
• wherein the structure of the portion is discontinuous and the structure of the portion is formed of a multitude of structures provided in a quantity of 1 to 10 per 10 mm2 of surface.