Quick Google for 'home made stains for oak timber' brought up this (hopefully of some use - NB You'll need to do the search to get the links yo the videos on YouTube - they haven't copied over):
Homemade stains for oak, which is high in tannins, are best created using oxidation or natural pigments. Common methods include vinegar mixed with steel wool (creates grey/ebony), strong brewed coffee or black tea (brown), or black walnut hulls. These methods are cost-effective, eco-friendly, and often produce a, rustic,,deep finish.
YouTube
YouTube
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Top Homemade Oak Stains
Vinegar & Steel Wool (Ebonizing): Combine 1 pad of fine-grade steel wool (diluted of oil) with 1.5 cups of white vinegar in a jar. Let it sit for 24–48 hours until the wool dissolves. This creates iron acetate, which reacts with oak’s high tannins to produce a dramatic silvery-grey or deep black finish.
Black Tea or Coffee (Tannin Booster): Brew very strong black tea or coffee. Apply directly to oak to darken it naturally. It works well as a pre-stain to add extra tannins for the vinegar mixture to react with, creating a richer, deeper color.
Coffee Grounds Stain: Mix used, dried coffee grounds with water to create a dark wash, or create a thick paste for a more intense, rustic stain, applying it to the wood and letting it sit overnight.
Acrylic Paint Stain: Mix 2 teaspoons of water with 1 teaspoon of acrylic paint for a simple, budget-friendly stain. This is versatile for customizing shades, allowing for application with a sponge and wiping away excess.
YouTube
YouTube
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This video demonstrates how to create a DIY wood stain using acrylic paint:
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59s
Our Upcycled Life
YouTube• 9 Apr 2025
Tips for Staining Oak
Pre-treating Oak: To make the vinegar stain darker, apply strong black tea to the oak first. The extra tannins in the tea react with the iron acetate for a richer, darker color.
Apply Multiple Coats: Apply, dry, and reapply for darker, more intense tones.
Seal the Stain: These stains are not protective, so apply a clear top coat such as polyurethane or beeswax to protect the wood, especially on frequently used items.
Safety: Always wear gloves, as natural stains like black walnut can leave stains on your skin and clothes.
YouTube
YouTube
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Watch this video to see how to apply the vinegar and steel wool stain to wood:
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37s
Black Forest Wood Co.
YouTube• 13 Dec 2024
DIY: Make Cheap Fast Wood Stain
23 Mar 2025 — hey everybody welcome back to the shop this is Todd with Industrial Comfort in today's video I'm going to show you how to take two...
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industrial comfort
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This DIY Wood Finish is seriously my new favorite stain.
2 Nov 2025 — we don't care about the nut in the center all we're after is that nasty gross outside. and here's the most important part of this ...
YouTube
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WhosTheVoss
5m
Homemade Natural Wood Stain
24 Jan 2019 — Make a simple natural wood stain with steel wool, vinegar, coffee or tea. I love using homemade natural wood stain. It is a beauti...
Houseful of Handmade
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14:37