Thanks for the info.
As for how it works I have been using it for 40 years to bring out the color in stocks I have made.It also has been used by european stockmakers for over 125 years.It will increse the contrast between light and dark figure in the wood.Dark streaks will turn darker and the lighter browns will take on a golden hue.
It can be made as a water based stain but I have never used it this way.
I make it by crumbeling up the bark.Put about 1-1/2" in a quart mason jar,add mineral spirits to about 2" cover and let stand a few days.Stir and mash a few times.Strain mixture in one of those little wire basket thingeys your wife probably has in the kitchen but dont get caught.
Allow mixture to reduce to a syrup consintanty bu leaving the top off a few more days then add boiled linseed oil.
The finished product should be translucent and purple you should be able to see light through it when held to a light in a 2 oz. bottle.
To apply just rub it into the wood buy hand ,while it is wet you will see the way finished product will look.Keep applying until the desired shade is obtianed.
Do not allow this to build up on the surface rub the stock with cotton cloth until it feels dry then apply first coat of clear oil and allow to dry.
Chuck.