Abstract: A dye which is durable for practical use in the field of coloring automobile seat materials for which a good light-fastness is required and a dyeing method making use of the dye is provided. In the method, a disazo dye is obtained by converting guanazole to a tetrazo compound and coupling the tetrazo with an indole derivative to form a compound which is then quaternized using e.g., an alkylating agent resulting in a red dye with superior light-fastness at high temperatures.

Abstract: A toilet seat structure capable of automatically feeding a seat covering paper onto a toilet seat substantially comprises a seat covering paper roll disposed at the rear end of a toilet seat body, a seat covering paper feeding mechanism which is provided with a press plate, a seat covering paper tearing mechanism, a control unit for controlling the seat covering paper feeding mechanism and the seat covering paper tearing mechanism and tension applying means for applying tension to the seat covering paper, wherein the seat covering paper which is subjected to tension is cut by applying a pressure thereto by means of the press plate. Due to such construction, the tearing edge of the press plate can be formed in a round shape so that wear of the cutting edge which is generated through the tearing operation can be miminized whereby maintenance or repairing can be also minimized.