| 摘要 |
<p>The invention provides a cleaning method of cleaning a product which is accommodated in an autoclave (11) and dyed by circulating a fluid in a supercritical state, the fluid into which dye is dissolved, and the autoclave (11) after the dyeing is finished, and the cleaning method includes continuously carrying out the cleaning by successively introducing a pure fluid in the supercritical state, the pure fluid including no dye, into the autoclave (11) after the end of the dyeing, thereby gradually reducing a concentration of the dye in the fluid in the supercritical state, the fluid existing in the autoclave (11). As a result, it is possible to effectively clean the products and the autoclave (11) by the supercritical fluid while suppressing precipitation of the dye which is dissolved into the supercritical fluid. Further, since the cleaning process is continuously carried out in succession to the dyeing process, it is possible to widely improve a cleaning efficiency.</p> |
