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30th May 2021, 12:17 PM #1GOLD MEMBER
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What is the blue on H2 construction pine
As per the title.
Any harm from it during dressing it all round?
Thanks in advance
Lyle
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30th May 2021 12:17 PM # ADSGoogle Adsense Advertisement
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30th May 2021, 12:26 PM #2
It's finger jointed and laminated , no knots. Nine fingers
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30th May 2021, 01:20 PM #3GOLD MEMBER
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I assume you mean the blue stuff for termite treatment. This supposedly treatment amazes me as the stuff appears NOT to penetrate the timber and when the timber is cut as in roof construction there is no protection applied on the cut so the termites eventually will find their way to cut and its goodbye to the structural integrity of the roof.
Experienced in removing the tree from the furniture
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30th May 2021, 01:49 PM #4
Good question. One I've never had answered, apart from "don't worry about it."
Besides harm to health, machining it can harm your machines if you're not careful.
The blue paint is slightly abrasive, so should you run a few lengths straight through a thicknesser or planer without adding a bit of skew to the feed (ie., you're running them through 'dead straight') then it'll quickly dull the knives at point of contact and - worse - abrade very quickly at the two points where the sides are cutting until it almost looks like chip damage.
It's obvious when you see it... a pair of tram-lines spaced at the width of your studs (or whatever) running down the length of any wider boards you send through later.
Solution? Try to send the boards through with differing skews or stagger their placement on the table to spread the wear across the knives. DON'T just send them through all in a straight line like a train of carriages.
(This is good operating practice anyway, for jointing/thicknessing any timber! But this is the reason why.)
- Andy Mc
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30th May 2021, 02:03 PM #5GOLD MEMBER
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Thanks for the replies. But those answers are not what I asked.
Found some info. It is a termite treatment. But the interesting thing is that you need dust extraction, respirator and clean yourself up after machining operations.
But no info, eg msds that I can find.
Is it more or less carcinogenic than the wood dust???
Lyle
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30th May 2021, 02:15 PM #6The person who never made a mistake never made anything
Cheers
Ray
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30th May 2021, 02:22 PM #7The person who never made a mistake never made anything
Cheers
Ray
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30th May 2021, 05:37 PM #8GOLD MEMBER
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Thank Ray. Excellent.
So it seems to be pretty benign.
I took precautions though just in case. Dusty, respirator and a good clean up after.
Thanks for your info.
Lyle
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30th May 2021, 06:48 PM #9
Bifenthrin, can't be too lethal, for I've never once seen a chippy wearing a mask.
I'd imaging the OH&S Nazis would be all over it if it were....
Bifenthrin - Wikipedia
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31st May 2021, 09:50 AM #10GOLD MEMBER
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Hi Lyle. I'm pretty sure that the "blue" is just a dye and that the treatment is applied through pressure and should penetrate most of the timber. Treated pine is now treated with a clear preservative and dyed green to distinguish it from plain radiata. The colours are about marketing and the last lot of H2 I used was yellow
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31st May 2021, 12:21 PM #11
Blue/red/yellow are surface treatments, not pressured treatments hence the timber is rated H2
Any H3 or better is pressure treatedThe person who never made a mistake never made anything
Cheers
Ray
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31st May 2021, 01:06 PM #12GOLD MEMBER
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Ray got me thinking so I did a little more research. This seemed a good place to start. Envelope treated timber should have an "E" after the brand. I will quiz my timber yard when I'm next there (hopefully this lockdown is only 7 days)
FAQ | Timber Preservers Association of Australia
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31st May 2021, 05:24 PM #13Woodworking mechanic
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Link to the chemical used
Bifenthrin General Fact Sheet
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31st May 2021, 05:45 PM #14
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31st May 2021, 06:19 PM #15GOLD MEMBER
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Big difference between silicosis and a pyrethroid. Back in the 70's we used to cut fibro without protection
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