Bleaching blue stain in white pine.

Dave Shepard · July 23, 2024, 09:40:07 PM

Has anyone had any luck bleaching blue stain in white pine. A little blue is ok, but some of the timbers are black. Thanks.

SwampDonkey · July 24, 2024, 03:13:26 AM

Hydrogen Peroxide or Oxalic Acid may work, I suspect results will vary. May require more than one application to.

Dave Shepard · July 24, 2024, 09:34:30 AM

Thanks. I don't remember bleach doing very much. I'm not trying to eliminate the stain, just knock it back a bit.

fluidpowerpro · July 24, 2024, 11:00:12 AM

I've done it on Red Pine. Put a mix of water and bleach in a spray bottle and spray it on. Multiple applications will be required. It seemed to me that direct sunlight helps speed to process.

Bruno of NH · July 25, 2024, 06:39:25 AM

Peroxide works

Dave Shepard · July 25, 2024, 10:45:14 AM

Thank you.

KenMac · July 25, 2024, 02:24:05 PM

When searching "wood bleach" I found that oxalic acid is sold as wood bleach. That would be where I'd start testing.

doc henderson · July 25, 2024, 03:00:53 PM

I was thinking that blue stain is hard to alter, according to, I think to Dr. Wengert

doc henderson · July 25, 2024, 03:05:05 PM

Is there an effective way to remove blue stain from kiln dried SYP? (forestryforum.com)

doc henderson · July 25, 2024, 03:07:34 PM

raw and with butcher block oil.

jpassardi · July 25, 2024, 06:09:52 PM

I might have to get one of those engravers like you have Doc.

doc henderson · July 25, 2024, 10:45:22 PM

Laser engraving - Page 7 (forestryforum.com)

Stephen1 · July 28, 2024, 08:47:48 AM

I just received a load of EWP. I don't really have a choice on when they come as I buy all my logs from a local Arborist who uses a mini Ex on all his job sites. Had an order for some EWP beams and asked if he had some logs, boom... 2 days later here is what I have. He wanted to bring another 2 loads but I had to refuse. Hard to saw no.
My real question for you guys is ...Can I turn my sprinkler on these logs to prevent blue stain in the logs. It is town water so it has chlorine in it. And how much do I have to spray on it?
What can I spray on the lumber when I saw it?
We are in the heat and humidity of summer up north here, 80-90F and lots of humidity, not quite what some of you southern boys have but hot for us up north.