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In Reply to: RE: If MDF is unstable, What About OSB? posted by Mike Porper on February 27, 2015 at 12:42:41
It does not creep, the reason MDF creeps because the resins used to bind the saw dust remain in a viscous state. OSB may be crumbly, but it does not creep because there is enough friction between the strands to hold it together. Saw dust just does not stick together well enough, as a result the only "strength" MDF has is from the glue, which is in a permanent viscous state. This is the exact reason you would not want to glue veneer with PVA or urethane glue, it will move on you over time. if you would take a chunk of cured resin used in these products and placed a large heavy object onto it, it would slowly sink into the resin.
dee
;-D
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
Follow Ups:
Will this help? The pieces have yet to be sanded and glued onto the board.
Whilst a picture is worth a thousand words, music, intangible, is worth a thousand pictures, ad infinitum.
It will change the characteristics, but won't droop
dee
;-D
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
Too late...lol...I chose something else...
Whilst a picture is worth a thousand words, music, intangible, is worth a thousand pictures, ad infinitum.
In that event, even though the piece in question is of a small size, fastening a couple of clear pine braces on the bottom of the shelf along its width, front and rear, would be prudent.
Whilst a picture is worth a thousand words, music, intangible, is worth a thousand pictures, ad infinitum.
It's used throughout the hifi industry. It's much better than resonanant particle board, though I understand that some expensive form of plywood's [Baltic Birch, I believe] better than MDF. But, nearly all manufacturers use MDF. And, veneer's glued right to MDF. The only thing to be wary of, as I understand it, is glueing actual harwood to it. As I understand it, the different rates of expansion/contraction can rip the hardwood to pieces.
Dimensionally unstable, hellishly heavy, edges must be sealed to prevent outgassing, and don't even think of getting any moisture near it, it will fall apart! It sucks (up water like a sponge) like crazy. I prefer Baltic birch plywood which I can then edge in any manner I see fit. Doesn't require painting to look nice, finishes nicely and can be stained any finish you want. My 2 cents.
By denying scientific principles, one may maintain any paradox.
Galileo Galilei
else avoid it.
dee
;-D
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
Lol...
I've already abandoned the mdf(now in lowercase) as the material for the shelf, due to the consensus against, and after subsequent research.
I saw the birch plywood while I was out today, but the smallest panel offered was 2' x 4' in size. I really didn't want any type type of plywood, even the birch, as most of it tends to warp.
Whilst a picture is worth a thousand words, music, intangible, is worth a thousand pictures, ad infinitum.
The structure is heavily reinforced, braced, layered, so it is cool.
dee
;-D
True terror is to wake up one morning and discover that your high school class is running the country.
quote by Kurt Vonnegut
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