A recording liquid including a coloring material, an organic solvent to disperse or to dissolve said coloring material, water, and a calixnarene-p-4-sulfonic acid (where n4-8) in the form of free acid or its metal salt. The recording liquid is very suitable for inkjet recording using plain paper as recording...http://www.google.com.hk/patents/US6688737?utm_source=gb-gplus-share專利 US6688737 - Recording liquid, inkjet recording method and recording equipment using the same
