Olympus Optical Company, Ltd.

Nissan Chemical Industries Limited

Takashi Kamiyama

Noriaki Ono

Kiyozo Koshiishi

Masanori Ota

Masashi Nakamura

Yoshimi Kato

A method for bleaching a cloth dyed with an indigo dye by using a processing solution containing a bleaching agent, wherein said processing solution is an aqueous solution of a dichloroisocyanuric acid salt, is disclosed. According to the invention, the degree of bleaching can be easily controlled and, after the bleaching, neither yellowing nor deterioration of fibers occurs.

Method for bleaching cloths

A measuring electrode device comprises a pH electrode arranged within an outer casing and having a pH sensitive member in contact with an electrolyte housed in the outer casing. The electrolyte reacts with a predetermined gas in a liquid to be inspected and varies its pH. The pH sensitive member includes a semiconductor substrate and a pH sensitive membrane formed on the substrate and in contact with the electrolyte. The pH sensitive membrane is formed of at least one element selected from the group consisting of silicon nitride, aluminum oxide and tantalum pentoxide. A potential difference is produced between the pH sensitive membrane and the electrolyte in accordance with the variation of the pH of the electrolyte. Thus, a potential difference is produced between the pH electrode and a reference electrode according to the variation of the pH of the electrolyte.

Measuring electrode device

An ion selective electrode having a silicon wafer substrate secured to one end of a tube made of insulating material by an adhesive agent and an ion sensitive film applied on the outer surface of silicon wafer substrate is disclosed. In order to prevent a portion of a side edge of silicon wafer substrate from being exposed to a sample liquid to be measured, the side edge of silicon wafer substrate is tapered and the ion sensitive film is applied on the tapered side edge as well as on the outer surface of silicon wafer substrate. The tapered side edge may be simply formed by effecting an anisotropic etching for a silicon wafer.

Ion selective electrode

A selective ion sensitive electrode is so constructed that an ion exchanger sensitive to a specific ion is formed on a metal electrode, an electric conductive resin electrode or a chlorinated metal electrode to which a signal wire is connected so as to maintain a stable electric connection between the signal wire and the ion exchanger over a long period of time. A layer of a silane coupling agent is used between the electrode member and ion exchanger.

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Tokyo, Japan

Takashi Kamiyama