Abstract: A method and device for producing a three-dimensional component by in-bath additive manufacturing comprising a bath (12) of a first fluid component and a nozzle (15) for dispensing a second fluid component. In use the nozzle is moved in the bath, and the fluid components react to produce said component. The second fluid component may be varied to change the visual and/or physical properties of the component. A computer (24) contains a digital record to control respective position of the nozzle and the bath.