You can’t say “no dye , just Alkanet oil” Alkanet is a dye in its own right, it’s what Indian cooking uses to add the colour to Rogan Josh.
My airguns: https://barx.org/airguns/
this is how i do it,get a jamjar,add a heaped tablespoon of shredded alkanet root ,fill the jar with boiled linseed oil.leave for 6 months agitating now and then.when the stock is prepared tip an eggcup full into another jar adding half a teaspoon full of terebine thinners.the thinners make the oil dry much faster.apply as normal.this is one of my vintage shot gun stocks i have refinished.
more guns than you can shake a stick at!
I need a minute, that colour and depth is perfection.
You'll Shoot your eye out Kid
A few that I did with boiled linseed oil for various customers and outfits including Holts:
Put on heading 270, assume attack formation