Thank you, Vicki, for taking the time to weigh your samples. That gives me =
more confidence that I am at least in the ballpark. I can't blow through it=
, but it seems close enough to give it a go. I can always try something els=
e if I find it. The foam John Hartog linked to is twice the density of what=
I have. Some day I'll probably try some different densities and see what h=
appens. I'm also looking forward to trying to implement Paul Jacobson's att=
enuation test.
Thanks so much.
John Crockett
Westminster, Vermont
--- In vickipowys <> wrote:
>
> Hi John,
>
> I reckon you do have the right type of foam with your green piece. =
> If it is one grade up from regular density you should be right.
>
> I just weighed a small block of my grey foam, it is exactly half the
> size of your piece, and also half the weight at just over 60 grams. =
> Yes it is quite squishy. I can blow breath through it with a little
> effort.
>
> I also looked at the original Crown SASS "black" foam, it weighs the
> same, just over 60 grams. The texture is slightly finer than my grey =
> block from Clark Rubber, but about the same effort is required to
> blow through it. Interesting now that I have the Crown SASS foam in
> my hands I can see that it is actually grey in the centre and looks
> as if it has been dipped in black dye at either end (to make it
> prettier no doubt).
>
> Good luck with the DIY project, you'll be right!
>
>
> Vicki
>
>
>
>
>
> On 12/07/2012, at 2:08 AM, John Crockett wrote:
>
> > Hi Vicki,
> >
> > The foam I am able to find locally is green (whatever that means!). =
> > It is called high-density foam (they also sell "regular" density,
> > which is white), and although the clerks in the store had no idea
> > about open or closed cell, it is absorbent like a sponge, so I
> > guess it is open-cell. It isn't nearly as dense as I expected, less =
> > so, I think, than the foam mattress pad I mentioned. It is quite
> > squishy. The 4" x 6" x 9" scrap I bought weighs 125 grams.
> >
> > Could I possibly have the right thing? I can return it if I bought
> > the wrong material, but how can I tell? Does anyone know?
> >
> > Many thanks,
> >
> > John Crockett
> > Westminster, Vermont
>
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