Abstract: Disclosed are an ink-jet recording method in which scanning is performed with a recording device having a plurality of recording element groups in correspondence with inks of different hues relatively in a direction crossing the direction in which the recording medium is fed to perform recording, the method including the steps of determining the scanning direction according to the duty of the image data in the scanning for recording, and performing recording by performing scanning in the determined scanning direction, and an ink-jet recording apparatus in which scanning is performed with a recording device having a plurality of recording element groups in correspondence with inks of different hues relatively in a direction crossing the direction in which the recording medium is fed to perform recording, including a device for determining the scanning direction according to the duty of the image data in the scanning for recording, and a device for performing recording by performing scanning in the determined s

Abstract: Disclosed is an inkjet printing apparatus for forming an image by repeatedly causing the scanning of a printhead that prints an image in a scan area using inks of a plurality of types. Residual duty, which is obtained by quantifying the mixed state of the inks used in printing the image in the scan area, is defined. The residual duty with regard to the next scan area is found from image data, the scanning direction for printing in the next scan area is decided based upon the residual duty, and the area is printed in the scanning direction that has been decided. Thus, back-and-forth scanning and unidirectional scanning are used jointly in appropriate fashion in accordance with the printed image. As a result, high-quality printing of an image becomes possible and a higher printing speed is achieved.

Abstract: The present invention provides an image forming apparatus comprising a wiper for wiping an ink discharge surface of an ink jet recording head, a cap for covering the ink discharge surface of the ink jet recording head, count means for counting a dot number of ink discharging from the ink jet recording head, measuring means for measuring a waiting time during when the ink discharging from the ink jet recording head is not effected, capping control means for effecting control in such a manner that, if the dot number counted by the count means reaches a second threshold value smaller than a first threshold value or exceeds the second threshold value and if the waiting time measured by the measuring means reaches a first predetermined waiting time or exceeds the first predetermined waiting time, the ink discharge surface of the ink jet recording head is covered by the cap, and wiping control means for effecting control in such a manner that, if the dot number counted by the count means exceeds the first threshold

Abstract: A color ink jet recording method/apparatus is capable of reducing blurring of ink dots without reducing dot saturation, generating no difference in tones of secondary colors, and inviting no reduction of throughput, hence materializing an excellent performance of recording in high quality at high speed. A color image is formed by causing ink dots of plural colors to land in such a manner that each of the ink dots is essentially not superposed. The ink dots have the optical density of 1 or more and 1.5 or less. Thereby, overlapping between adjacent ink dots is lessened, and thus a high-quality color image having no difference in tones of secondary colors and a high saturation can be attained.

Abstract: Color ink jet recording method/apparatus capable of reducing blurring of ink dots without reducing dot saturation, generating no difference in tones of secondary colors, and inviting no reduction of throughput, hence materializing an excellent performance of recording in high quality at high speed. A color image is formed by causing ink dots of plural colors to land in such a manner that each of the ink dots is not essentially superposed. The ink dots have the optical density of 1 or more and 1.5 or less. Thereby, overlapping between adjacent ink dots is lessened, and thus a high-quality color image having no difference in tones of secondary colors and a high saturation can be attained.

Abstract: Disclosed are an ink-jet recording method in which scanning is performed with a recording device having a plurality of recording element groups in correspondence with inks of different hues relatively in a direction crossing the direction in which the recording medium is fed to perform recording, the method including the steps of determining the scanning direction according to the duty of the image data in the scanning for recording, and performing recording by performing scanning in the determined scanning direction, and an ink-jet recording apparatus in which scanning is performed with a recording device having a plurality of recording element groups in correspondence with inks of different hues relatively in a direction crossing the direction in which the recording medium is fed to perform recording, including a device for determining the scanning direction according to the duty of the image data in the scanning for recording, and a device for performing recording by performing scanning in the determined s

Abstract: A processing method is presented for treating sludges from municipal and waste materials. The ashes from such sludges, containing SiO.sub.2 as a primary constituent, are treated with additives to tailor the feed material composition. Thermal processing, including melting, rapid cooling and subsequent annealing, produces a crystallized glass microstructure in which needle-shaped shaped crystals of anorthite and .beta.-wollastnite are infiltrated with a vitreous material. Such crystallized glasses having superior mechanical and aesthetic properties are an attractive architectural material which can be utilized for interior finishing, exterior walls, flooring as well as for interior decorations.