Oak Gall Powder Tannin | Green - themazi
Oak Gall Powder Tannin | Green - themazi
Oak Gall Powder Tannin | Green - themazi
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Oak Gall Powder Tannin | Green

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$8.50 USD
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$8.50 USD
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Name: Green Oak Gall Powder Tannin

Scientific Name: Quercus Infectoria

Oak Gallnut is one of the best tannin sources that you can use in natural dyeing in the mordanting process.  It is favored by natural dyers as it does not impart a strong colour to the fabric by itself.  Oak gallnut powder helps you to create very sharp shades of any color by assisting a mordant to bind to cellulose fibers.  

How oak gallnut powder is produced:

Here at themazi, we collect the gallnuts from our oak forests in summer. The gallnuts are made by a type of wasp, and act as protection for the wasp larvae until they hatch, so we harvest at the right time of year to allow the life cycle of the wasp to be complete.  To make doubly sure all the insects have left the galls, once picked, the gallnuts are left outside for at least two months before grinding and packaging.  

Historical use of oak gallnut:

Oak gall is known to have been used since Roman times to make ink, and was the main constituent of ink for many centuries.  It is used in ayurvedic and herbal medicine and is thought to have anti-bacterial and anti-inflammatory properties.

 How to use oak gallnut powder:

Oak galls are high in tannin and are usually used to treat cellulose fibers before the use of an aluminum-based mordant.

Ensure your fiber/fabric has been properly scoured before use. 

Use 10g oak gallnut powder for each 100g of fiber.  Put the weighed powder into a non-reactive vessel, and pour over boiling water.  Stir to release the tannin from the powder.   Add enough hot water (hot from the tap/faucet is sufficiently hot) so that the fiber/fabric can be completely covered with room to stir easily.  Wet the fiber/fabric and add it to the tannin bath. Cover and leave to stand overnight, stirring occasionally.  To keep the tannin bath warm for as long as possible, you can cover with a lid and wrap with a towel.

An alternative method is to leave the tannin bath overnight without adding the fiber/fabric, then strain off the powder particles, reheat the tannin liquid and then add the fibre/fabric, leaving overnight again.


Michel Garcia has tested our green oak gall and said: "I tried your oak gall, making an extract using lab apparatus .  I got about 80% of soluble matter. This is very good; the extract is similar to oenological extracts sold in France." Michel Garcia is a botanist, chemist, dyer, and naturalist. 

Ceilidh: "I discovered themazi’s natural dyes at the beginning of this year. It was the first time I dyed with madder and I was totally blown away by the colour I achieved. Super rich reds when used in conjunction with tannin and lovely salmon pinks when used with alum mordants alone.

I also tried using the tannin (oak gall powder) for the first time and it is now my go-to method of mordanting fibers.

I achieved beautiful bright yellows with the weld and I still have some other products I can’t wait to experiment with!

themazi is a great company with great ethics and lovely customer service."

Ceilidh is based in The south of France where she does natural dyeing for her brand Billynou and creates YouTube videos about natural dyeing with her partner Alex and daughter Billy 🌱

How do we ship your order? 

We ship our products worldwide. Once you enter your address, you can see the shipping cost to your country. We ship with express delivery which means we use TNT, UPS, or DHL carriers.

Please keep in mind that the shipping cost is calculated on the basis of weight including packaging, so it may be beneficial to order more than one product at a time.  You will pay the same shipping fee for 400g of products as for 100g.

Buying oak gall powder in bulk:

We sell oak gall powder in small quantities as shown on our website. Please be aware that we also sell bulk quantities wholesale. We consider every order over 50kg as wholesale and we offer discounted prices.  To enquire about this, click here

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