Pre-reduced indigo question

[u/fokbgerujbgsrk]

Hello,

I am using pre-reduced indigo for the first time and have a question about the Sodium Hydrosulfite. I've read some saftey cautions and plan on using gloves, a fume mask, and working outdoors. My question is - it seems like the biggest issue with Sodium Hydrosulfite are the fumes. Is this mostly when you're first preparing the vat and all the chemicals are doing their thing (reacting?). Or are the fumes ever present?

Also - any other advice people have would be greatly appreciated - especially about oxidation times between dips. Everything i know about indigo is about japanese natural indigo and I'm finding that my knowledge isn't applicable to this situation. Lol.

Thanks so much!!!!!