Provided is a pulse generation device capable of suitably adjusting and outputting a pulse pattern by a simple configuration. According to the method, disazo pigments can be obtained which manifest excellent transparency and flowability of the inks produced therefrom, and excellent flushing property and flushing drain coloration resistance in the pigment production process, or excellent dispersibility when ink is formed under dry condition. The method of the present invention is an improvement to the known method for making a siloxane layer on a substrate, wherein instead of a liquid phase solution chemistry, the improvement is a supercritical phase chemistry. In certain embodiments of the invention, tendon porches are mounted to the outboard surface of one or more pontoons. At least one second, spare, removable ink supply is stored within the base at a second position.