The invention relates to an abrasive article 1 for abrading at least one workpiece, the abrasive article with: a carrier body 2, at least one abrasive layer 3 with a main surface and a predefined thickness, the at least one abrasive layer being arranged on the carrier body, at least two visual indicators 6 with a cross-section in the main surface of the abrasive layer, wherein the size, shape and/or location of the cross-section of the visual indicators in the main surface of the abrasive layer depends on the thickness of the abrasive layer at more than one location of the visual indicators.

The invention relates to an abrasive article 1 for abrading at least one workpiece, the abrasive article with: a carrier body 2, at least one abrasive layer 3 with a main surface and a predefined thickness, the at least one abrasive layer being arranged on the carrier body, at least two visual indicators 6 with a cross-section in the main surface of the abrasive layer, wherein the size, shape and/or location of the cross-section of the visual indicators in the main surface of the abrasive layer depends on the thickness of the abrasive layer at more than one location of the visual indicators.

The invention relates to a method for producing an alumina based abrasive particle (1), comprising at least the following steps: forming a sol as a solution or dispersion of alumina particles, gelling the sol by adding gelling agents, forming shaped bodies from the gel using an additive procedure, drying and firing the shaped bodies while retaining the previously achieved geometry of the abrasive particles. Hereby, it is provided that an optically binding binder is added to the sol and/or the gel, the gel is applied additively layer by layer and the binder is set using electromagnetic radiation so as to form the shaped bodies. The produced abrasive particle may be formed, in particular, by six intersecting or overlapping triangular volume regions.

The invention relates to a method for producing an alumina based abrasive particle (1), comprising at least the following steps: forming a sol as a solution or dispersion of alumina particles, gelling the sol by adding gelling agents, forming shaped bodies from the gel using an additive procedure, drying and firing the shaped bodies while retaining the previously achieved geometry of the abrasive particles. Hereby, it is provided that an optically binding binder is added to the sol and/or the gel, the gel is applied additively layer by layer and the binder is set using electromagnetic radiation so as to form the shaped bodies. The produced abrasive particle may be formed, in particular, by six intersecting or overlapping triangular volume regions.

According to one embodiment, a method of making an abrasive article is disclosed. The method can comprise: providing a surface; disposing magnetizable abrasive particles on the surface; and varying a magnetic field relative to the magnetizable abrasive particles to impart a non-random orientation and/or alignment to the magnetizable abrasive particles relative to the surface.

According to one embodiment, a method of making an abrasive article is disclosed. The method can comprise: providing a surface; disposing magnetizable abrasive particles on the surface; and varying a magnetic field relative to the magnetizable abrasive particles to impart a non-random orientation and/or alignment to the magnetizable abrasive particles relative to the surface.

A polishing tool with a carrier comprising a polishing surface on which a polishing paste is applied at least in some areas, wherein the polishing surface consists of a nonwoven fabric, the polishing paste is in a solid state at room temperature and is applied on the polishing surface to be covered in an amount of 0.08 g/cm.sup.2 to 0.30 g/cm.sup.2.

A method of making a coated abrasive article, the method comprising: providing a backing, providing a curable abrasive slurry having a homogeneous dispersal of abrasive particles, applying the abrasive slurry to at least part of a major surface of the backing and forming a surface texture in the slurry, wherein the abrasive slurry is capable of maintaining the homogeneous dispersal of abrasive particles and the surface texture in an uncured state.

A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder. The diamond abrasive grains and the CBN abrasive grains have projecting tips acting on a workpiece, the projecting tips having a variation in height of 10 μm or less, the diamond abrasive grains having their projecting tips with irregularities of 0.1 μm or more in height.

A super-abrasive grinding wheel includes a core and a super-abrasive grain layer provided on a surface of the core, the super-abrasive grain layer including diamond abrasive grains and CBN abrasive grains, the diamond abrasive grains and the CBN abrasive grains being fixed to the core in a single layer by a binder. The diamond abrasive grains and the CBN abrasive grains have projecting tips acting on a workpiece, the projecting tips having a variation in height of 10 μm or less, the diamond abrasive grains having their projecting tips with irregularities of 0.1 μm or more in height.