A waste-ink absorbent to be mounted on an ink-jet recording apparatus comprises a composition containing a biodegradable polymer and a microorganism growth nutrient. An ink contains a recording agent and a liquid medium for dissolving or dispersing the recording agent, the recording...http://www.google.com.au/patents/US5713991?utm_source=gb-gplus-sharePatent US5713991 - Recording apparatus and ink employing biodegradable substance
