Abstract: An image transcription apparatus inludes a random access recording medium which has a picture data recording area, an attribute data recording area and a thumbnail image data recording area for storing image data indicating features of the picture date in correspondence to the attribute data. A memory is employed which has a work area used upon recording of the picture data on the recording medium and reproduction therefrom, an attribute data storage are for storing the attribute data recorded on the recording medium and a shared storage area used for storing temporarily the picture data upon recording and reproduction. The shared storage area is so arranged as to be capable of storing the thumbnail image data when the picture data is neither being recorded nor reproduced. The attribute data and the thumbnail image data can speedily be displayed on the display unit.

Abstract: An optical disk recording apparatus includes a recording unit for recording at least image data on an optical disk medium and a thumbnail generating unit for generating, for each partial recording section of image data to be recorded on the optical disk medium, thumbnail data of a particular image associated with the partial recording section, the thumbnail data being recorded on the optical disk medium. When a particular operation is conducted, the particular image is read for each of the partial recording sections, thumbnail data is generated for the particular image, and the thumbnail data of a plurality of images is recorded on the optical disk medium in the form of a string of data.

Abstract: Disclosed is a method of producing a disazo pigment, in which a coupling reaction is carried out while feeding, into an acidic aqueous solution, a tetrazo aqueous solution containing a tetrazo component of benzidines and a coupler aqueous solution containing a coupling component, wherein the coupling component is a mixture comprising a main component represented by the formula (1): CH3COCH2CONH—X, wherein X represents a phenyl group optionally having one or the same or different plural substituents selected from the group consisting of a methyl group, methoxy group and chlorine atom; a first additional component represented by the formula (2): CH3COCH2CONH—Y, wherein Y represents a phenyl group having a substituent selected from the group consisting of —CONR2 group, —SO2NR2 group and —NHCOR group, and the phenyl group may further have a substituent selected from the group consisting of a methyl group, methoxy group, chlorine atom, —CONR2 group, —SO2NR2 group and &mdas

Abstract: Disclosed is a method of producing a disazo pigment, which a coupling reaction is carried out while feeding, into an acidic aqueous solution, a tetrazo aqueous solution containing a tetrazo component of benzidines and a coupler aqueous solution containing a coupling component, wherein the coupling component is a mixture comprising a main component represented by the formula (1): CH3COCH2CONH—X, wherein X represents a phenyl group optionally having one or the same or different plural substituents selected from the group consisting of a methyl group, methoxy group and chlorine atom; a first additional component represented by the formula (2): CH3COCH2CONH—Y, wherein Y represents a phenyl group having a substituent selected from the group consisting of —CONR2 group, —SO2NR2 group and —NHCOR group, and the phenyl group may further have a substituent selected from the group consisting of a methyl group, methoxy group, chlorine atom, —CONR2 group, —SO2NR2 group and —N

Abstract: An image transcription apparatus includes a random access recording medium which has a picture data recording area, a attribute data recording area and a thumbnail image data recording area for storing image data indicating features of the picture data in correspondence to the attribute data. A memory is employed which has a work area used upon recording of the picture data on the recording medium and reproduction therefrom, an attribute data storage area for storing the attribute data recorded on the recording medium and a shared storage area used for storing temporarily the picture data upon recording and reproduction. The shared storage area is so arranged as to be capable of storing the thumbnail image data when the picture data is neither being recorded nor reproduced. The attribute data and the thumbnail image data can speedily be displayed on the display unit.

Abstract: High quality .beta.-form copper phthalocyanine pigment printing ink is produced by the present method, this method reducing the large amount of time and labor required in the process of pigmentation of crude copper phthalocyanine and production of the pigment printing ink.To this end, the production method of printing ink according to the present invention is characterized by adding to crude copper phthalocyanine, 20-80 weight % of printing ink resin based on the amount of the crude copper phthalocyanine, dry-milling the mixture at 80-170.degree. C., and heating the ground material in printing ink solvent. The printing ink obtained contains copper phthalocyanine particles of .beta.-form crystals with an aspect ratio of 1-2.