Just aquired some Jatoba that has partial areas of mold. Ran a couple of pieces through the jointer to see what the inside looked like. While you can still see lighter areas on the jointed stock, the mold does not appear to have penetrated to the extent that I would want to discard it. As I have a bunch of this, I am wondering what the effects would be down the road, say as to finishing, glue ups, etc. Any thoughts on this subject would be appreciated. Precautions would be taken as to dust exposure. Thanks
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Replies
I hear Borax will kill mold. You might want to try it and finish the test piece a week or so later to see if the treated wood takes the finish.
Regards,
Ken
"Do as you would be done by." C.S. Lewis
20 Mule Team Borax kills anything cept humans unless we eat it I think!
I'm not an expert, but it's my understanding that once the moisture content (MC) is below 20 percent, the mold simply dies, as it no longer has the proper amount of moisture. Planing it off should not leave you with a problem, unless the exposed wood is rotted.
I cut and dry all my own hardwood, and have never had a problem with mold on North American hardwoods. I don't know if Jatoba is any different, I've never used it.
Jeff
One thing I would suggest is cleaning off the mold before you machine the wood. I'd spray with a 10% solution of bleach, let it sit for 10 mins. or so, and wipe off. Mold reproduces via spores, and you don't want them flying around in your air, or getting pushed/mushed into the stock while milling.
forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
Another proud member of the "I Rocked With ToolDoc Club" .... :>)
Mold reproduces via spores, and you don't want them flying around in your air
I think you'd be hard pressed to find any air, outside of a semiconductor clean room or a hospital operating room, that didn't already have mold spores flying around. The stuff is ubiquitous; always has been, despite what the last toxic mold job-security-for-lawyers hype would have one think.
Also, regarding bleach, while clorine bleach is a wonderful, powerful, cheap disinfectant, the one thing it isn't very effective against it mold spores. Mold spores are the one infective agent that the more expensive chemicals are needed for. the conventional wisdom to treat household mold infestations doesn't make alot of sense, but then the whole toxic-mold hype doesn't in the first place.
How do I know this? 'just remembering having to deal with a bout of a disease called aspyrgillosis (caused by mold) in a bird population, a long time ago.
Hi, Barry, yep there are mold spores ever present (living in the Great Northwest, I'm constantly reminded of this, unfortunately) but adding to the load in an enclosed room by jet-propelling them along with sawdust just doesn't seem like a good idea to me.
Bleach would kill any living mold, right? A step in the right direction anyway, and combined with the wetting/wiping process should at least reduce the load of spores. No scientific evidence though. forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)Another proud member of the "I Rocked With ToolDoc Club" .... :>)
Yea, it kills living mold. Doesn't effect the spores.
Mold is caused by a moisture problem. Air the lumber out of a few days/weeks and should be fine, plane and get to working. Ideally, check the moldy areas with moisture meter when you believe it to be dry.....Dale
Thanks for all the info, didn't want to waste any of the wood if I didn't have to. After jointing a few pieces I think 99% of the wood will be usable. Seems to be plenty dry. Thanks again.
I agree with forestgirl. I got a load of poplar trim from a friend when he moved that was in his crawlspace for about 3 years. Some of that stuff looked like it could have walked away on its own. I washed it down with a bleach solution and let it dry in the sun for the afternoon. Haven't seen any mold on it since, and I get a good close up view every time I knock my head on it walking around the TS. Gotta move that rack somewhere else.Andy"It seemed like a good idea at the time"
Mold cannot grow on lumber whose moisture content is below 18%. Whatever mold you see has stopped if it's been dried. It's a push to get lumber below this critical point because of sticker stain, most other problems associated with mold are inconsequential if it occurs in the normal course of dryingLeeMontanaFest
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