The problem to be solved by the present invention is to provide a method for producing an aqueous pigment dispersion that has certain dispersion stability with which the formation of coarse particles with time and the settling of a pigment and the like with time can be reduced and that can be used for producing an ink having excellent discharge stability. The present invention relates to a method for producing an aqueous pigment dispersion, the method including kneading a composition including a pigment including one or more materials selected from the group consisting of a violet pigment, a green pigment, and an orange pigment and a resin, the composition having a nonvolatile content of 50% by mass or more, under predetermined conditions and subsequently performing a centrifugation treatment.

An agitation/defoaming device is provided, which can independently control revolving and rotational motion and can change a rotational direction relative to a revolving direction without a two-system rotary drive. The apparatus includes a rotary driving source, a braking device for rotary motions; first and second rotors revolved around revolving shaft, and first and second rotational bodies and container holders pivotally supported by the first rotor. A braking force is applied to the second rotor revolving along with the first rotor, generating a rotational motion, which is transmitted to either the first or second rotational body according to the revolving direction of the first rotor. The rotational motion is then transmitted from the first or second rotational body to the container holder through the first rotational body, thereby transmitting to the object the rotational motion according to the revolving direction while revolving the object.

A dispersion device is provided, including a container and a porous dispersion structure. The container has a first receiving space. The porous dispersion structure has at least three porous dispersion layers and has a second receiving space, wherein the porous dispersion structure is located in the first receiving space of the container.

The method for producing a pigment-kneaded product includes a step [1] of supplying at least a pigment and a resin to a container provided in a kneading apparatus and a step [2] of kneading the resulting content (content (a1)) present in the container until a storage elastic modulus of content (a1) at an angular frequency of 1 rad/s, which is obtained by measurement of dynamic viscoelasticity at 25 C., reaches a range of 200 kPa to 30,000 kPa.

[Problem] To provide a agitation/defoaming method and device with which both of uniformity in dispersion of object to be processed and reduction of air bubbles can be achieved with high precision. [Solution] Provided is a agitation/defoaming method for producing orbital and spin motions of a container containing object to be processed by a device provided with orbital and spin drive motors that can independently control the velocities of the orbital and spin motions. Both defoaming and agitating treatments with high precision can be achieved by respectively performing a reverse rotation superimposition processing, wherein the rotational frequency of the spin drive motor is obtained by superimposing the first rotational frequency in a direction opposite to the direction of the orbital motion on the frequency of the orbital motion, and a same rotation superimposition processing, wherein the rotational frequency of the spin drive motor is obtained by superimposing the second rotational frequency in the same direction as the direction of the orbital motion on the frequency of the orbital motion, at least once.

A temperature-measuring device including a transmitter and a receiver. The transmitter is configured to measure the temperature of the material being contained in a container being revolved and/or rotated, and is configured to transmit data including a value of the measured temperature. The receiver is configured to receive the transmitted data. The transmitter is disposed in or on an upper lid detachably secured to the container, so that the transmitter can detect an incident light emitted from the material, and the transmitter can be revolved along with the container.

An apparatus configured for mixing the contents of one or more fluid containers includes a fluid container support platform configured to hold one or more fluid containers. The fluid container support platform is configured to index the container to one or more specified locations and to be moved in an orbital path about an orbital center independently of the rotation about the central axis of rotation. The apparatus further includes an indexing drive system configured to effect indexing movement of the container support platform and a vortex drive system configured to effect powered orbital movement of the container support platform about the orbital center. An evaporation limiting insert placed within containers reduces exposure of the fluid contents of the container to atmospheric air, thereby reducing susceptibility of the fluid contents to evaporation.

An agitation/defoaming device is provided, which can independently control revolving and rotational motion and can change a rotational direction relative to a revolving direction without a two-system rotary drive.

The apparatus includes a rotary driving source, a braking device for rotary motions; first and second rotors revolved around revolving shaft, and first and second rotational bodies container holders pivotally supported by the first rotor. A breaking force is applied to the second rotor revolving along with the first rotor, generating a rotational motion, which is transmitted to either the first or second rotational body according to the revolving direction of the first rotor. The rotational motion is then transmitted from the first or second rotational body to the container holder through the first rotational body, thereby transmitting to the object the rotational motion according to the revolving direction while revolving the object.

An apparatus configured for mixing the contents of one or more fluid containers includes a fluid container support platform configured to hold one or more fluid containers. The fluid container support platform is configured to index the container to one or more specified locations and to be moved in an orbital path about an orbital center independently of the rotation about the central axis of rotation. The apparatus further includes an indexing drive system configured to effect indexing movement of the container support platform and a vortex drive system configured to effect powered orbital movement of the container support platform about the orbital center. An evaporation limiting insert placed within containers reduces exposure of the fluid contents of the container to atmospheric air, thereby reducing susceptibility of the fluid contents to evaporation.

An apparatus configured for mixing the contents of one or more fluid containers includes a fluid container support platform configured to hold one or more fluid containers. The fluid container support platform is configured to index the container to one or more specified locations and to be moved in an orbital path about an orbital center independently of the rotation about the central axis of rotation. The apparatus further includes an indexing drive system configured to effect indexing movement of the container support platform and a vortex drive system configured to effect powered orbital movement of the container support platform about the orbital center. An evaporation limiting insert placed within containers reduces exposure of the fluid contents of the container to atmospheric air, thereby reducing susceptibility of the fluid contents to evaporation.