HYDROS – REDUCING AGENT FOR INDIGO / WOAD VATS
Chemical name: Sodium Dithionite (Thiox) | Grade: Textile | Use rate: ≤ 25 g per 10 L vat

Hydros—also known as sodium dithionite, thiox, or hydrosulfite sodium—is the fast, reliable oxygen remover used to bring indigo or woad vats into reduction. A quick sprinkle over the surface turns the liquor a yellow-green and readies it for dipping within about an hour. However, for best performance leave the vat for 2 days before dyeing.

Why choose our Hydros
• Consistent, high-purity powder for rapid vat activation
• Cost-effective alternative to spectralite (use a little more, save a lot)
• Fine, free-flowing granules supplied in a resealable pouch

Directions (10 L vat)

1. Set vat at 40 °C with indigo/woad and alkali already dissolved.

2. Sprinkle 25 g Hydros evenly over the surface. Always add Hydros to water—never water to Hydros.

3. Cover and wait ± 60 min. Vat should shift to yellow-green with a metallic film.

4. Stir gently, keeping air out, then begin dipping.

In a nutshell
• Function: Oxygen remover / vat reducer
• Other names: Sodium dithionite, thiourea dioxide, thiox, hydrosulfite sodium
• Compatibility: Indigo, woad, other vat dyes
• Typical dose: 2–5 g · L⁻¹ (max. 50g per 10 L)
• Packaging: Resealable moisture-proof pouch
• Safety: Wear gloves & mask; store cool & dry away from acids and oxidisers

Safety & storage
Keep sealed, cool and dry. Avoid inhalation of dust. Add powder to water—never the reverse—to prevent rapid exothermic reaction. Dispose of spent vats according to local regulations and keep away from children.

Need a full setup? Pair with our Natural Indigo Kit for a ready-to-dye bundle.

Neem Leaves and Spray

Neem Leaves

These Neem leaves are grown on a small organic farm in India. The farm is kbA registered (registered organic).

Available in leaf form or as spray*

Neem is very popular and is used for so many things, medicinal, anti-fungal and as insecticide.  We treat all our articles with the neem oil spray in order to protect the yarns and wool from moths.

Neem oil Spray 

Neem oil, cold pressed from the fruits and seeds of the Indian Neem tree. Like the Neem leaves, the oil is ideal for protecting fabric, yarn and fibers from insects and moths. I use it all the time and I have yet to see a moth!

200ml spray bottle of Neem oil contains: cold pressed Neem Oil mit 1% Azadirachitin (active ingredient in Neem oil) natural essential oils, Isopropyl - alcohol

What customers say:
"Brilliant keeps midges out too and the smell just goes away I found it quite citrus but it may smell different to each person Hubby smelled faint lemongrass"

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Basic Recipe (Leaves): 

Sew little pouches (or use drawstring bags), just like Lavender pouches, stuff them loosely with Neem leaves, and put them into your yarn/wool storage. They smell pleasantly, but that is my opinion and so far doesn't seem to leave an odor on the yarn/wool.

100gr is enough for 5 small pouches.

Basic Recipe (Spray):

Simply spray onto your items, there is no trace of the oil or long term smell on your products. Even though the oil smells strong when applied. Pleasantly though, but that is my own opinion.