Abstract: An on-machine development type planographic printing plate precursor has a support and an image-recording layer on the support. The image-recording layer contains an initiator, an infrared absorber capable of donating electrons to the initiator, and a color-developing substance precursor. The image-recording layer can form an image by exposure to infrared laser, and in a case where the image-recording layer is exposed to an infrared laser with a wavelength of 830 nm at an energy density of 110 mJ/cm2, a brightness change ?L of the image-recording layer before and after the exposure is 3.0 or more. A method for preparing a planographic printing plate and a planographic printing method employ the on-machine development type planographic printing plate precursor.

Abstract: The present invention relates to a mineral composition, characterized in that the mineral composition comprises 100 parts by weight of a metal salt having a solubility product in water at 25° C. of 1.0×10?7 or less and 0.5 to 50 parts by weight of an emulsifier having an HLB of 6 to 10, wherein the metal salt comprises fine particles having an average particle size of 0.05 to 1 ?m.

Abstract: The present invention relates to a mineral composition, characterized in that the mineral composition comprises 100 parts by weight of a metal salt having a solubility product in water at 25° C. of 1.0×10?7 or less and 0.5 to 50 parts by weight of an emulsifier having an HLB of 6 to 10, wherein the metal salt comprises fine particles having an average particle size of 0.05 to 1 ?m.

Abstract: In a portable radio apparatus, a displaying unit displays predetermined information in response to an ON signal and stops the display of the information in response to an OFF signal. An operation unit with buttons including specified buttons generates a start signal in response to operation of any of the specified buttons by a user. A detecting section generates a display request in response to the start signal. A control section issues the ON signal to the displaying unit in response to the display request from the detecting section and the OFF signal to the displaying unit such that the predetermined information is displayed on the displaying unit for a time period equal to or longer than a predetermined time period.

Abstract: An image data read out system in a digital image processing system which includes an image buffer memory for storing image data, a predetermined area of the image buffer memory being defined as a window having n (columns).times.m (rows). An image data processing circuit sequentially reads out the image data from every one column in the image buffer memory, converts a bit structure of the image data from parallel data to serial data, packs the serial data into packed data in predetermined groups of bits and transfers the packed data to a next stage. A basic line memory group has n basic line memories, where n corresponds to a number of columns, each of the basic line memories having m line memories, where m corresponds to a number of rows. The image data of one column is stored in one of the basic line memories such that each bit of the image data is shifted one by one at every one of the basic line memories.