Can I keep mold out of wet rags?
A sealed plastic bag will not help.  The spores that caused mold are literally everywhere.  Unless you have a &quot;clean room&quot; to process the rags, you're not going to keep the spores out.
The dilute bleach solution, however, is likely to be fruitful. You may want to experiment with the concentration of the bleach to find the most effective ratio.