| 摘要 |
An ink jet apparatus is provided for printing on both surfaces or one surface of a sheet-shaped printing medium by using an ink jet head including a plurality of ink ejecting ports facing the printing medium and energy generating elements. The apparatus comprises a printing density changing section for changing a printing density on the printing medium, a both surface/one surface printing mode designating section for designating either of a both surface printing mode for printing on both surfaces of the printing medium and a one surface printing mode for printing on one surface of the printing medium, a printing density selecting device for selecting a low printing density when the both surface printing mode is designated by the both surface/one surface printing mode designating section, the printing density being selectable between a normal printing density and a low printing density lower than the normal printing density, and a controlling section for actuating the printing density changing section such that the printing density becomes the printing density selected by the printing density selecting section. With this construction, an occurrence of striking through cannot be markedly recognized as desired.
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