Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

On Mon, 14 Feb 2011 19:10:38 -0700, you wrote:

There're several densities of fiberboard. MDF is rather dense and
more expensive. The stuff typically sold in home stores may not be
MDF (or HDF, if it exists), It does exist in a lower (and perhaps more
porous) version.

That's what I've heard.

Harvey

>>
>>
>> > You should be able to find 1/4" MDF, just mask the unused MDF.
>> >
>>
>> If I understand him correctly he was wanting a backer board to protect the
>> table top but also wanted it to have air flow for the vacuum to hold down
>> the board. I don't think that your going to get much air flow thru what I
>> call MDF of any thickness. Maybe the Masonite Hardboard Peg Board material
>> would do what he wants.
>>
>> Ben
>>
>> Yeah, I wondered about that when I first read this thread too. What I know
>as MDF definitely will not let air through. It's pretty dense stuff. The
>only thing that would probably go through MDF is water, and once that
>happens, you wouldn't have MDF anymore - just some kind of soupy puddle.
>
>Andrew
>
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>>
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