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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