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Old 05-07-2014, 09:13 PM   #1
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red plywood question


forgive my question but I had to put some plywood under a bed,
went to Home Depot brought it home cut it to size
as I wiped the dust off of it I noticed it has a red stain residue.
it is stamped stating it was processed at a temperature sufficient to remove bugs and fungus.
my main concern is the red stain chemical. I didn't know if it was okay to put under a bed, so excuse my ignorance Ian an electrical apprentice.
thanks Mike h
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Old 05-07-2014, 09:28 PM   #2
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Mike... Good God.... What and who has HD now found to supply them....

I have no idea... but I'm dying to know... I think HD has gone to krap.... and I used to use them alot.

Best

Edit: Mike... This is just a comment, no insult at all, but I can't stop laughing at plywood cooked to kill the fungus/bedbugs/whatever. If you did not have 20 posts, I'd think this was a great joke/spoof or troll.

And I will probably be laughing at myself, when I discover that alot of inexpensive chinese plywood is actually cooked...

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Old 05-07-2014, 09:55 PM   #3
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Pete it's reddish with some kind of residue, now Ian laughing that your laughing, seriously I'm an electrical student, and not a good one, but I did not want to put it under the bed until I figured out what it was treated with, because when you wipe it the red comes off.
but I do not see any bugs so at least they are honest ha ha
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Old 05-07-2014, 10:21 PM   #4
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The red stain is called ink.
It would not be a good idea to ingest it.

Whats the problem with temperature treating wood to ensure there are no living bugs in it ??? Bugs living in trees are common. Would you prefer toxic chemicals ???
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Old 05-07-2014, 10:23 PM   #5
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You probably got the top sheet from the bunk.They color code the edges of some bunks with a dye.The top sheets usually get a lot of overspray.Have no idea what's in the dye.
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Old 05-07-2014, 11:22 PM   #6
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Quote:
Originally Posted by SPS-1 View Post
The red stain is called ink.
It would not be a good idea to ingest it.

Whats the problem with temperature treating wood to ensure there are no living bugs in it ??? Bugs living in trees are common. Would you prefer toxic chemicals ???
Honestly SPS.... I guess nothing is wrong with it.... but I have never seen that stamped on any ply before....

Had you ever seen it?

Had you ever heard of any bug decay problems with plywood before?

Maybe it was always done and never stamped before.... but I've been buying the stuff for 40+ years and never seen it..... Yes, the red could be a bunk stamp.... I was refering to the notice stamped on it.


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Old 05-07-2014, 11:31 PM   #7
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Quote:
Originally Posted by SPS-1 View Post

Whats the problem with temperature treating wood to ensure there are no living bugs in it ??? Bugs living in trees are common. Would you prefer toxic chemicals ???
Now ya got me worried.... cause I've got alot of studs, rafters, joists, headers.beams, lathe. sills, jacks. cripples, and some shims that I'm not sure were appropriately cooked.... besides a bunch of sheathing and decking.

I still think it's funny.... never really thought of how bugs were kept out of milled wood.

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Old 05-07-2014, 11:35 PM   #8
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Or it could be the "hibernious qalasto pluerbus" beetle.....









,,,, sometimes known as the "heat seeking red ink excreting" beatle.
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Old 05-07-2014, 11:41 PM   #9
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Sounds to me like you might have picked up some Georgia Pacific Plytanium Dryply. Its a floor sheathing that has a water resistant layer on it. Sometimes its red in color.

Or as mako1 said, a sheet from the top of a skid that has red overspray on it. I've gotten lots of green OSB that way.
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Old 05-08-2014, 12:22 AM   #10
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Either way Mike.... I would use it and think it is perfectly safe
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Old 05-08-2014, 06:48 AM   #11
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Steps in manufacturing plywood according to the Engineered Wood Association:

Around here, we have the Emerald Ash Borer. You are not even supposed to take raw wood out of the county. Out west they have the Mountain Pine beetle that is spreading. You gotta figure that if they want to ship the wood to various states or countries, they need to demonstrate there are no invasive bugs in the wood. Maybe they started stamping it on the wood as a response to customer concerns.
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Old 05-08-2014, 12:37 PM   #12
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Quote:
Originally Posted by SPS-1 View Post
Steps in manufacturing plywood according to the Engineered Wood Association:

Around here, we have the Emerald Ash Borer. You are not even supposed to take raw wood out of the county. Out west they have the Mountain Pine beetle that is spreading. You gotta figure that if they want to ship the wood to various states or countries, they need to demonstrate there are no invasive bugs in the wood. Maybe they started stamping it on the wood as a response to customer concerns.
SPS...... Honest, I'm always interested in learning.....

Is the artical you attached that refers to the heat application in plywood manufacturing, directed at killing bugs, or just drying and glueing it... (the artical did not address that)

And I guess I would then ask, what protects us from bugs in dimensional lumber?

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Old 05-08-2014, 05:30 PM   #13
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That paper seemed to be listing the general steps in making plywood, but explaining how they would kill any fungus or insect.

Just my results of a quick Google search. Found this too on dimensional lumber. As I suspected, if you want to send your lumber across a boarder, you need to be able to show it does not contain invasive species. (sorry the text is so small)
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Old 05-08-2014, 06:00 PM   #14
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I am not really sure on the rules on building lumber. But at our plant (in usa) all our pallets, for our products, going out of the country have to be cooked for bugs. Maybe the stamp is for if it is ok for export.
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