A developer comprising: at least one carrier; and in an amount of 10 wt-% or less, a coating material (237, 248, 268), in particular for generating a coating layer by non-impact printing, the coating material being provided in the form of particles and comprising: a curable resin being an at least partially thermal curable resin, in particular curable by a crosslinking agent able to react with functional groups of the resin, the resin comprising an amorphous resin portion, wherein the amount of the amorphous resin component in the coating material is at least 30 weight percent with respect to the overall amount of resin in the coating material; wherein an average diameter of the particles is in a range between 1 μm and 25 μm; wherein the particles have an average sphericity larger than 0.7, in particular larger than 0.8, in particular a sphericity larger than 0.9; wherein, if the coating material is heated from room temperature with a heating rate of 5 K per minute, the coating material upon heating reduces its viscosity down to a minimum viscosity and increases its viscosity upon further increase of the temperature; wherein the minimum viscosity, determined according to the description, is in a range between 3 Pascal seconds and 20000 Pascal seconds; and wherein the average sphericity of the coating material is defined by the average circularity of the particles, wherein the circularity of a particle is determined by a circumference of a circle having an area that is equal to largest area enclosed by a perimeter of the particle divided by the perimeter. at least one carrier; and in an amount of 10 wt-% or less, a coating material (237, 248, 268), in particular for generating a coating layer by non-impact printing, the coating material being provided in the form of particles and comprising: a curable resin being an at least partially thermal curable resin, in particular curable by a crosslinking agent able to react with functional groups of the resin, the resin comprising an amorphous resin portion, wherein the amount of the amorphous resin component in the coating material is at least 30 weight percent with respect to the overall amount of resin in the coating material; wherein an average diameter of the particles is in a range between 1 μm and 25 μm; wherein the particles have an average sphericity larger than 0.7, in particular larger than 0.8, in particular a sphericity larger than 0.9; wherein, if the coating material is heated from room temperature with a heating rate of 5 K per minute, the coating material upon heating reduces its viscosity down to a minimum viscosity and increases its viscosity upon further increase of the temperature; wherein the minimum viscosity, determined according to the description, is in a range between 3 Pascal seconds and 20000 Pascal seconds; and wherein the average sphericity of the coating material is defined by the average circularity of the particles, wherein the circularity of a particle is determined by a circumference of a circle having an area that is equal to largest area enclosed by a perimeter of the particle divided by the perimeter. a curable resin being an at least partially thermal curable resin, in particular curable by a crosslinking agent able to react with functional groups of the resin, the resin comprising an amorphous resin portion, wherein the amount of the amorphous resin component in the coating material is at least 30 weight percent with respect to the overall amount of resin in the coating material; wherein an average diameter of the particles is in a range between 1 μm and 25 μm; wherein the particles have an average sphericity larger than 0.7, in particular larger than 0.8, in particular a sphericity larger than 0.9; wherein, if the coating material is heated from room temperature with a heating rate of 5 K per minute, the coating material upon heating reduces its viscosity down to a minimum viscosity and increases its viscosity upon further increase of the temperature; wherein the minimum viscosity, determined according to the description, is in a range between 3 Pascal seconds and 20000 Pascal seconds; and wherein the average sphericity of the coating material is defined by the average circularity of the particles, wherein the circularity of a particle is determined by a circumference of a circle having an area that is equal to largest area enclosed by a perimeter of the particle divided by the perimeter.