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Bleaching Black mold?

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Forum topic by pontic posted 06-23-2018 04:01 PM 451 views 0 times favorited 15 replies Add to Favorites Watch
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pontic

615 posts in 662 days


06-23-2018 04:01 PM

If it is black mold. I have some planks that have been in my dryer for a while. They still had the bark on them in a few spaces. When I stripped the bark off the sapwood underneath was black.
I cleaned it as much as I could.
Is it mould? If it is can I put bleach on it to 1) kill the mold; 2) get rid of the black stains?

-- Illigitimii non carburundum sum


15 replies so far

View Rich's profile

Rich

3194 posts in 643 days


#1 posted 06-23-2018 04:22 PM

Hard to say just from the description, but you can always give oxalic acid a try. Mix about 2 to 4 tablespoons in a jar of hot water and brush it on. Keep brushing and letting it dry until you see crystals form on the surface. Then rinse and see what you have. Hopefully it’s at least somewhat lighter. Multiple treatments might be needed.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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pontic

615 posts in 662 days


#2 posted 06-23-2018 05:00 PM

Where can I get oxalic acid

-- Illigitimii non carburundum sum

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Rich

3194 posts in 643 days


#3 posted 06-23-2018 05:27 PM

I ordered mine off of Amazon.

https://www.amazon.com/OXALIC-Crystals-Cleaning-Removal-Remover/dp/B0147JPQAI

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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CharlesNeil

2421 posts in 3924 days


#4 posted 06-23-2018 05:32 PM

Walmart has it , they call it Wood Bleach
you may need to use some clorox to kill the mold first, about a qt to a gallon of water
oxcylic acid, kills metal ( rust stains) and may help the black, clorox will help kill the mold spores.

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Woodknack

12061 posts in 2434 days


#5 posted 06-23-2018 05:34 PM

Did you try hitting the spot with a draw knife or plane to see what’s under the black.

-- Rick M, http://thewoodknack.blogspot.com/

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Rich

3194 posts in 643 days


#6 posted 06-23-2018 05:43 PM

Depending on what you like, simply killing the mold with Charles’ Clorox suggestion and not bleaching might leave behind some really cool looking wood to work with.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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LesB

1774 posts in 3497 days


#7 posted 06-24-2018 06:02 PM

Regular household bleach should work or a deck cleaner which is sodium hypochlorite…sometimes called deck brightener. Oxalic acid might work and should be available at any paint store or paint department of a big box store. It is commonly used to clean teak wood on boats before adding a new oil finish so a boat store should have it too.
It might take several applications of any of these if the staining is severe. Wear gloves, don’t get it on your clothes (unless you like the tie dye look). Rinse well after application.

-- Les B, Oregon

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pontic

615 posts in 662 days


#8 posted 06-24-2018 09:40 PM

top picture is the mold side that I sprayed with bleach. You are looking at the third application. It is a little lighter now and I am confident that the mold is dead. I don’t think it looks too bad for the underside of the top of a hall table I’m making for a client. I like the top.

-- Illigitimii non carburundum sum

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verdesardog

162 posts in 2665 days


#9 posted 06-25-2018 01:45 PM

House hold bleach IS sodium hypochlorite

-- .. heyoka ..

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CharlesNeil

2421 posts in 3924 days


#10 posted 06-25-2018 02:03 PM

be sure to neutralize the bleach
1 tablespoon of baking soda to a pint of water will do it .

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pontic

615 posts in 662 days


#11 posted 06-26-2018 03:06 PM



be sure to neutralize the bleach
1 tablespoon of baking soda to a pint of water will do it .

- CharlesNeil

Will do.

-- Illigitimii non carburundum sum

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TheFridge

9711 posts in 1540 days


#12 posted 06-26-2018 08:22 PM

After the big flood down here in 2016 I’ve heard many times that’s bleach is insufficient to completely kill mold. Just what ive heard. Not what I know.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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Rich

3194 posts in 643 days


#13 posted 06-26-2018 09:33 PM

OK, this is hilarious. There happens to be a site dedicated to removing black mold. You’ll never guess the URL. Ready? Wait for it…

https://www.howtoremoveblackmold.com

Betcha didn’t see that one coming.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

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TheFridge

9711 posts in 1540 days


#14 posted 06-26-2018 09:56 PM

Who in there right king would name a website that amaright? :)

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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woodbutcherbynight

5274 posts in 2463 days


#15 posted 06-28-2018 02:49 AM



OK, this is hilarious. There happens to be a site dedicated to removing black mold. You ll never guess the URL. Ready? Wait for it…

https://www.howtoremoveblackmold.com

Betcha didn t see that one coming.

- Rich

ROFLMAO

-- Live to tell the stories, they sound better that way.

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