Signify Holding B.v.

Stefan Willi Jukius Gruhlke

Rifat Ata Mustafa Hikmet

Ties Van Bommel

Provided is a method for producing a 3D item using fused deposition modelling, the method comprising a 3D printing stage comprising: layer-wise depositing an extrudate comprising 3D printable material, to provide the 3D item comprising 3D printed material, wherein the 3D item comprises a plurality of layers of 3D printed material having a core-shell 3D printable material, wherein the core material comprises a core thermoplastic material and core additive material, wherein the shell material comprises a shell thermoplastic material and shell particles, wherein the shell material is light transmissive, wherein the shell particles comprise specularly reflective particles, wherein the core additive material comprises one or more of diffuse reflective particles, white particles, black particles, colored particles, and dye molecules, and wherein the core material and shell material differ in one or more optical properties selected from the group of color, reflectivity, type of reflectivity, and absorption of light.

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BAESWEILER, Germany

Stefan Willi Jukius Gruhlke