An information processing apparatus includes a processor configured to: obtain characteristic values including smoothness and basis weight of a recording medium; and identify the type of the recording medium on the basis of the smoothness and the basis weight.

In an image forming apparatus, a detecting unit is configured to detect a characteristic value indicating a characteristic of a recording material fed from a sheet feeding unit. A determination unit is configured to determine a type of the recording material, based on the detected characteristic value and a determination rule for determining a type of a recording material. A control unit is configured to control an image forming condition for performing image formation onto the recording material in accordance with the determined type of the recording material. A collection unit is configured to collect an operation history of the image forming apparatus. An adjustment unit is configured to adjust the determination rule used by the determination unit based on the collected operation history.

A conveyance device includes a conveyance roller, a registration roller, a sensor, a mode setting part, a storage, a conveyance state determination part and a drive control part. The mode setting part sets the mode to either a plain paper mode or a tab paper mode. The storage stores threshold information corresponding to the mode. The conveyance state determination part determines, when the plain paper mode is set, whether the conveyance state of the recording medium is a skew conveyance state or a tab paper conveyance state, based on the detection result of the sensor and the plain paper mode threshold information. The conveyance state determination part determines, when the tab paper mode is set, whether the conveyance state of the recording medium is the skew conveyance state or the tab paper conveyance state, based on the detection result of the sensor and the tab paper mode threshold information.

An image forming apparatus includes a first image forming unit that develops a first latent image using a first developer so that a first developer image is developed with the first developer, a second image forming unit that develops a second latent image using a second developer, which is lower in saturation or higher in light-permeability in comparison to the first developer, so that a second developer image is developed with the second developer, a transfer part that transfers the first developer image and the second developer image to a medium, and a control part that controls an amount of the second developer used to develop the second developer image according to a type of the medium.

An image forming apparatus includes an image former that forms an image on a sheet of paper, a detector that detects a physical property of a sheet of paper, a receiver that receives paper identification information used in identification of a sheet of paper designated by a user, and a hardware processor. The hardware processor performs: first judgement of judging whether or not there is a correspondence between the paper identification information received by the receiver and a detection result by the detector, second judgement of judging whether or not there is a correspondence between a detection result by the detector of a first sheet of paper conveyed and a detection result by the detector of a second sheet of paper conveyed; and operation control of the image former based on a first judgement result in the first judgement and a second judgement result in the second judgement.

A conveyance device includes a conveyance roller, a registration roller, a sensor, a mode setting part, a storage, a conveyance state determination part and a drive control part. The mode setting part sets the mode to either a plain paper mode or a tab paper mode. The storage stores threshold information corresponding to the mode. The conveyance state determination part determines, when the plain paper mode is set, whether the conveyance state of the recording medium is a skew conveyance state or a tab paper conveyance state, based on the detection result of the sensor and the plain paper mode threshold information. The conveyance state determination part determines, when the tab paper mode is set, whether the conveyance state of the recording medium is the skew conveyance state or the tab paper conveyance state, based on the detection result of the sensor and the tab paper mode threshold information.

An information processing apparatus includes a processor configured to: obtain characteristic values including smoothness and basis weight of a recording medium; and identify the type of the recording medium on the basis of the smoothness and the basis weight.

In an image forming apparatus, a detecting unit is configured to detect a characteristic value indicating a characteristic of a recording material fed from a sheet feeding unit. A determination unit is configured to determine a type of the recording material, based on the detected characteristic value and a determination rule for determining a type of a recording material. A control unit is configured to control an image forming condition for performing image formation onto the recording material in accordance with the determined type of the recording material. A collection unit is configured to collect an operation history of the image forming apparatus. An adjustment unit is configured to adjust the determination rule used by the determination unit based on the collected operation history.

An image forming system includes: a transfer unit that transfers an image onto an object; a transporter that transports the object in the horizontal direction; a raising/lowering unit that raises and lowers the object in the vertical direction; and a processor configured to: after height adjustment performed by the raising/lowering unit, if the object has a top whose height is greater than a predetermined height when the object is to be transported to the transfer unit, stop the transport of the object to the transfer unit.

An image forming apparatus includes: a transport unit that transports a recording medium having an image formation surface whose height changes from a front end toward a rear end; a transfer unit that transfers an image onto the image formation surface of the recording medium transported by the transport unit by making contact with the image formation surface; and a support unit that supports the recording medium without hindering contact of the transfer unit with the image formation surface and is transported together with the recording medium by the transport unit.