Abstract: A high viscosity jetting method includes jetting a liquid by a through-flow piezoelectric printhead through a nozzle in a nozzle plate, wherein a section of a nozzle has a shape including an outer edge with a minimum covering circle, the maximum distance from the outer edge to the center of the minimum covering circle is greater than the minimum distance from the outer edge to the center from the minimum covering circle times 1.2, and the jetting viscosity of the liquid is at least 20 mPa·s.

Abstract: A high viscosity jetting method includes jetting a liquid by a through-flow piezoelectric printhead through a nozzle in a nozzle plate, wherein a section of a nozzle has a shape including an outer edge with a minimum covering circle, the maximum distance from the outer edge to the centre of the minimum covering circle is greater than the minimum distance from the outer edge to the centre from the minimum covering circle times 1.2, and the jetting viscosity of the liquid is at least 20 mPa·s.

Abstract: A high viscosity jetting method includes jetting a liquid by a valvejet printhead through a nozzle in a nozzle plate, wherein a section of a nozzle has a shape including an outer edge with a minimum covering circle, wherein the maximum distance from the outer edge to the centre of the minimum covering circle is greater than the minimum distance from the outer edge to the centre from the minimum covering circle times 1.2, and wherein the jetting viscosity of the liquid is at least 20 mPa·s.

Abstract: A method to prepare a metallic nanoparticle dispersion includes the steps of forming a metallic precursor dispersion or solution by adding a metallic precursor to a dispersion medium including: (a) a solvent according to Formula I, and wherein R1 and R2 represent an optionally substituted alkyl group, R1 and R2 may form a ring, (b) a carboxylic acid according to Formula II, R—COOH?? Formula II wherein R is an optionally substituted C2-C7 alkyl, alkenyl or alkynyl group, reducing the metallic precursor with a reducing agent to form metallic nanoparticles, sedimenting the metallic nanoparticles to obtain a highly concentrated metallic nanoparticle dispersion comprising at least 15 wt % of metallic nanoparticles.

Abstract: A method to prepare a metallic nanoparticle dispersion includes the steps of forming a metallic precursor dispersion or solution by adding a metallic precursor to a dispersion medium including: (a) a solvent according to Formula I, and wherein R1 and R2 represent an optionally substituted alkyl group, R1 and R2 may form a ring, (b) a carboxylic acid according to Formula II, R—COOH??Formula II wherein R is an optionally substituted C2-C7 alkyl, alkenyl or alkynyl group, reducing the metallic precursor with a reducing agent to form metallic nanoparticles, sedimenting the metallic nanoparticles to obtain a highly concentrated metallic nanoparticle dispersion comprising at least 15 wt % of metallic nanoparticles.