dechlorinating

A 10 minute bath in a solution of 20 parts water to 1 part chlorine bleach has been suggested for hardier plants, followed by soaking in water containing a dechlorinating agent.

It is used in water treatment as an oxygen scavenger agent and also as a metals precipitant, in the photographic industry to protect developer solutions from oxidation, in textile industry as a bleaching, as a desulfurising and as a dechlorinating agent and in leather trade for the sulfitisation of tanning extracts.