This invention provides a printing apparatus which employs a print head constructed to minimize a memory area to hold ejection data and not requiring a sophisticated manufacturing technology and thus realizes a print mode to perform a higher-than-normal-resolution printing, making it possible to form a high quality image when needed. The transistors are of the normally ON field-effect type, for example JFETs, and are each controlled by a gate control device. An upstream end of the conduit passes through the partition and opens in the front chamber. The ball is positioned within an interior of the socket. 01 mPa\xb7s or more, wherein the amount of viscosity lowered is expressed by the following equation:=\u2212,wherein the standard polishing composition is prepared which comprises 20 parts by weight of an abrasive, said abrasive being high-purity alumina having Al2O3 purity of 98. After the user-initiated command has been triggered, the agent receives and deploys the artifact without further user interaction.