Turning wood that may have mold

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Forum topic by loiblb posted 02-21-2016 04:01 PM 569 views 0 times favorited 6 replies Add to Favorites Watch
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98 posts in 476 days

02-21-2016 04:01 PM

I have some pecan that has some dark streaks in it. I put on a mask and turned a part and stained it see if it showed up. It’s not noticeable. I hate to toss this stuff out will mold if it is mold become inactive with time?

6 replies so far

View Nubsnstubs's profile


811 posts in 1150 days

#1 posted 02-21-2016 04:08 PM

What color is the mold? Black lines indicate spalt lines and is a mold, but a good mold for turnings. The grey is what I call a nuisance mold. Wear a good mask with N95 rating when turning any wood, especially moldy wood. Jerry (in Tucson)

-- Jerry (in Tucson)

View Wildwood's profile


1851 posts in 1555 days

#2 posted 02-21-2016 04:45 PM

Jerry may be right might be dealing with spalted wood. Whether mold or spalted wood essentially stabilizes once remove cause of that growth.

Since don’t know where you live providing this reference so can figure out whether live in an area prone to mold growth. See figure 14-1 Climate index for decay hazard on page 2.

I live in an area prone to mold growth & spalting. I turn wood with mold & stain sometimes cannot turn it away and sometimes can, sometimes cut it away before turning. Have no problem turning spalted wood.

-- Bill

View LeeMills's profile


268 posts in 722 days

#3 posted 02-21-2016 05:30 PM

Interesting article Bill.
Below is a link to one of the videos by Dr. Spalt (Sara Robinson); scroll down about 1/3.
Per Sara mold and fungus are completely different and fungus will not hurt you. It can be halted by drying the wood or by the application of DNA.
She talks about zone lines, different colors, different fungi which you can use. etc.
She does quite a few presentations at woodturners clubs.

Here is another from youtube at a woodturners club I believe.

-- We cannot solve our problems with the same thinking we used when we created them. Albert Einstein

View MrUnix's profile (online now)


4030 posts in 1619 days

#4 posted 02-22-2016 06:39 AM

Post a picture of the wood… mold (fungi) is typically just the beginning of the decay process and can produce some really neat results. As mentioned, the black lines are spalting and once removed from a moisture source, are quite benign:


-- Brad in FL - To be old and wise, you must first be young and stupid

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1851 posts in 1555 days

#5 posted 02-22-2016 04:43 PM

Have seen those video and others and read many of her articles. Did not read her article in American Woodturner (Dec:22-28).

She and her colleges have a book coming out sometime in June 2016.

JMHO, only thing really need to know about spalted wood not all of it suitable for turning. You can find different formulas online for spalting wood, which have never tried. Where I live just leaving a log on or near the ground can start the spalting process. If look on my projects page will find lot of examples of spalted wood. Turned a lot of pens using spalted wood and sold almost everyone of them.

-- Bill

View JoeinGa's profile


7370 posts in 1427 days

#6 posted 02-22-2016 08:57 PM

Here’s a few of mine from Pecan





-- Perform A Random Act Of Kindness Today ... Pay It Forward

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