I’m restorying an antique wheel chair. The wood I have been told is Chestnut. I have made a few replacement pieces out of W.oak. The grain seems to match the closes.
I cleaned up the old wood with only sandpaper,most of the old finish was gone. I tried a #1 cut blond shellec for a sealing coat.
The wood turned a medium brown . So I tried a mixture of 1/3 terp. 1/3 spur varnish 1/3 linseed oil. The wood turned a dark brown.
When I applied the shellec and the mixture to the new wood separately everything ended up as expected. A slight yellowing thats all.
Can anyone give me an idea whats happening.
Thanks Brad
Replies
The two woods turn out, when wet by the oil/varnish finish, not to have the same underlying color the oil/varnish mix just highlighted that difference.. The shellac may also have affected the ability of the oil/varnish finish to be absorbed, perhaps less on the chestnut than on the white oak. Since you were planning to use the oil/varnish the shellac was a mistake, though apparently the chestnut was not fully sealed enough to prevent the oil/varnish from letting it reach it's natural "wet out" color. I hope you did wipe off all the excess oil/varnish mix.
If you want the two woods to match you will pretty much need to make the new oak match as close as you can to the old chestnut. The best way to accomplish this is to use a dye to change the color. But to use the dye you should remove all the existing finish, both the oil/varnish and the shellac. Trying to use an oil based stain would tend to emphasize the grain structure of the white oak, probably making it appear more different from the chestnut. If you had spray capabilities you might use a dye toner to darken the white oak, without giving added prominence to the pores. .
Turning wood brown
Thank you Mr Schoene, for the speedy and informative reply. The shellac and oil / varnish mix was applied to two different piece of chestnut. And yes I timed 5 mins and then wiped off any excess oil / varnish mix.
You have proven to me that I'm on the right track. I have spent over $60 dollars on dye to try to match the brown color and gray hues of the chestnut on the w.oak.
I guess there will be no magic solution. I was getting very discourage. But knowing I'm headed in the right direction helps.
Thanks Brad
Try some experiments with your dye where you apply the base color (a brown probably a bit more vivid in hue but not too dark), then partially seal with no more than 1lb. cut of shellac, and then apply the second color (grey). (Or depending on the look, you might start with a bit of the grey and after partially sealing the brown. By the way, until you have sealed the wood, you can mix dye on the wood in separate applications. You can also wipe down with water if you want to lighten a dye a bit.
Turning wood brown
Thanks again Mr. Schoene. I'll give it another try. Buy the way, my shop is starting to look like a chemistry lab with all the jars of dye. Is this normal ?
I tried TransTint medium brown water base dye on the white oak. After drying it was to red in color. So I wiped a TransTint green dye over the to redish brown dye. It did help,but it's still to light a brown. My new question is can I add the green dye stright into the brown dyes jar to help reduce the red color,or do I have to wipe the green dye on.
Thanks Brad
You can take your choice--it will work either way. The results could differ a bit it you apply the greenish dye while the brown is still damp, but would be very much the same as mixing them as liquids if you wait for the ifrst coat to fully dry before applying the second coat.
Turning wood brown
Mr Schoene thanks for your time and help. All I have had where books for reference.
Brad
Cool thread...
Maybe put the oak outside on a sunny day for a bit also... that will help.. bring out the greys.
This forum post is now archived. Commenting has been disabled