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Forum topic by Innovator posted 1769 days ago 878 views 0 times favorited 21 replies Add to Favorites Watch
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Innovator

3584 posts in 2008 days


1769 days ago

Topic tags/keywords: question maple bandsaw lathe sander bowl turning

I am turning a bowl from some more of the wood I spalted and spoke about in my project post Maple Bowl Surprise

I turned the outside of another blank and when I tried sanding it the wood was still soaked so the sandpaper was clogging up very quickly. I decided to leave it and come back the next day and give it another shot. Well one day turned into three days and I just went down to look at it and I have mold growing on the outside of the bowl. I have never heard of it happening before so it threw me at first when I saw it.

Where I need help is with the mold. What can I do to kill the mold and not stain the wood? Do I use watered down bleach or what?

Any help would be appreciated!

Thanks
Rob

-- Whether You Think You Can or You Think You Can't, YOU ARE RIGHT!!!


21 replies so far

View reggiek's profile

reggiek

2240 posts in 1865 days


#1 posted 1769 days ago

There are quite a few fungicides on the market…bleach is good…but can cause discoloration on your wood…I would first try it on a test piece or on somewhere that is not visable….In order to kill fungus, bleach must be diluted (for some weird reason pure bleach will encourage the fungus…whereas diluted will kill)....

Copper is another anti fungal…but it is usually blue colored and very color fast…it will stain.

I’ve heard about using baking soda…or any other bicarbonates…once again…always test first…There are also several enzyme based fungicides that may work….

Do a web search for fungicides and take a look at what pops up..

-- Woodworking.....My small slice of heaven!

View Grumpy's profile

Grumpy

19307 posts in 2446 days


#2 posted 1769 days ago

Thats a new one to me Rob. Mould can be very dangerous, particularly if particles are released in the air. Perhaps talk to an industrial chemist at a factory that makes cleaning chemicals.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View degoose's profile

degoose

6967 posts in 1950 days


#3 posted 1769 days ago

Just a thought but you might try vinegar.

-- Drink twice... and don't bother to cut... @ lazylarrywoodworks.com.au For lovers of all things timber...

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jockmike2

10635 posts in 2842 days


#4 posted 1769 days ago

I don’t think you’re dealing with white rot fungus anymore. That’s the regular fungus in maple that makes it spalt. I think Grumpy is right I think you better be careful, this just don’t sound like any kind of spalted maple I’ve ever dealt with.

-- (You just have to please the man in the Mirror) Mike from Michigan -

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reggiek

2240 posts in 1865 days


#5 posted 1769 days ago

Another thought occurred to me….you might try fuming the bowl by puting it in a plastic bag with a bowl of some fungicide….that way the mold can be killed without exposure to you…or to any chemicals that might spoil the wood…

Just a thought

-- Woodworking.....My small slice of heaven!

View TopamaxSurvivor's profile

TopamaxSurvivor

14575 posts in 2271 days


#6 posted 1769 days ago

I know a wood sawyer who has been at it for 35-40 years. He told me not to worry about that mold grows on spalted wood. He said I could kill it if it bothered me, but it’s just he spalting mold coming back to life. Any time spalted wood gets wet, there is the possibility of it regenerating. He said it’s not a toxic type that makes all the headlines. The mold is though out the wood. It is nearly impossible to get it all.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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Innovator

3584 posts in 2008 days


#7 posted 1769 days ago

Thanks all for the comments.

Grumpy & Mike you were thinking on the same lines as me MOLS, caution, red flag.

I did some investigation after I saw the posts from Larry & Reggiek and the most popular solution was to use vinegar. So I cleaned the outside of the bowl with white vinegar. Actually after I removed the entire mold I soaked the bowl with the vinegar.

I felt more comfortable after reading Topmax’s comment.

Folks thanks for the posts and the ideas, I do appreciate it. I will let you know what the results are in a day or two.

Rob

-- Whether You Think You Can or You Think You Can't, YOU ARE RIGHT!!!

View Grumpy's profile

Grumpy

19307 posts in 2446 days


#8 posted 1769 days ago

Thanks Rob. I will watch with interest.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View Roper's profile

Roper

1346 posts in 2308 days


#9 posted 1769 days ago

i’m glad you got it all figured out,when i’m turning spalted wood i either make sure i have enough time to finish the piece and put a finish on it so the mold has no exposure to moisture , or i put a heavy coat of anchorseal on it if i cannot finish, for the same reason moisture. have fun and wear a mask with spalted woods.

-- Roper - Master of sawdust- www.roperwoodturning.com

View TopamaxSurvivor's profile

TopamaxSurvivor

14575 posts in 2271 days


#10 posted 1769 days ago

I have some spalted wood the mold came through the anchorseal. It was setting around for a long time in an unheated building.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View John Ormsby's profile

John Ormsby

1276 posts in 2332 days


#11 posted 1769 days ago

Some people can have a very bad reaction to spalted woods. It is always a good idea to wear a proper respirator when working with spalted woods. The person mentioned who has been working with it for 30 or more years has been very fortunate. I have heard of some people who have developed very serious respiratory illness from spalted wood mold.

-- Oldworld, Fair Oaks, Ca

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TopamaxSurvivor

14575 posts in 2271 days


#12 posted 1769 days ago

He runs a sawmill. It’s a lot different than being in an enclosed area. Next time I see him I’ll ask if he uses a respirator on spalted woods when he makes up turning blanks. It never hurts to take precautions with potential toxins. I don’t go looking for dusty old sheds to tear down even though with Hantavirus, you have to contact it, which is rare, then your system has to be susceptible to it. Here in Water World, aka, Western WA, there have been a lot of out breaks of toxic molds in the last few years. But we still grow spalted wood too :-)) There are a gazillion different types of molds.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Bob #2's profile

Bob #2

3808 posts in 2617 days


#13 posted 1769 days ago

If it’s just a bowl you are concerned with , put it in a brown paper bag and toss it in ana oven at 240 ° F for an hour.
I you want to stop the spalt in blanks a soak in bardac or similar is effective.

-- A mind, like a home, is furnished by its owner

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TopamaxSurvivor

14575 posts in 2271 days


#14 posted 1769 days ago

What’s bardac? Never heard of it.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Innovator's profile

Innovator

3584 posts in 2008 days


#15 posted 1769 days ago

Bob I also have never heard of berdac, is it something purchased in a supermarket or a specialty chemical?

Thanks again
Rob

-- Whether You Think You Can or You Think You Can't, YOU ARE RIGHT!!!

showing 1 through 15 of 21 replies

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