Adsorbent for ink jet use, an ink retaining container, an adsorption member using such an adsorbent, an ink supply system having such adsorption member, and an ink jet recording apparatus

An ink retaining container comprising:

• an ink retaining portion for retaining ink to be supplied to an ink jet head;
• an ink supply opening becoming the ink supply portion from said ink retaining portion to said head;
• an atmospheric communication opening for communicating said ink retaining portion with the air outside,
• said ink retaining container being provided with an adsorption member arranged in a position to be in contact with ink in said ink retaining container, having the higher adsorption capability with respect to the hydrophobic substance contained in ink than the colorant herein.

An ink supply system comprising:

• an ink jet head;
• an ink retaining container provided with the ink retaining portion to retain ink to be supplied to said ink jet head, the ink supply opening becoming the ink supply portion from said ink retaining portion to said head, and the atmospheric communication opening to communicate said ink retaining portion with the air outside;
• and
• ink supply paths communicating said ink jet head with said ink retaining container,
• an adsorption member being arranged in a position to be in contact with ink in either in said ink jet head, said ink retaining container, or said ink supply paths, having the higher capability of adsorption with respect to the hydrophobic substance contained in ink than the colorant contained therein.