On Fri, 18 Dec 2015 19:36:10 -0500, Justan Olphart
wrote:

On 12/18/2015 4:39 PM, wrote:
On Fri, 18 Dec 2015 12:08:05 -0500, Justan Olphart
wrote:

14.7 should be enough to collapse all the air molecules at sea level.
The vaccum expert, and I mean expert should be along shortly to tell you
the whole story.

If that was true, there would not be any air here.
Check out Boyle's law

If you sucked 14.7 psi of air out of something at sea level you pretty
much sucked it all out.

I would be shocked if there was more than ~15" (hg) of vacuum there.

Going at this another way,
Coffee is generally 11% water (Roasted and dried) so a pound is ~1.8
oz of water or 51 grams. (51 CCs)

this block is ~61 cu/in. (roughly 1000 CCs)
949 CCs is not water and it weighs 14.2 oz (402.5g)
That is a specific gravity of .42.
I am not sure what that might be something solid but I am not sure
what could be that solid with that low a SG.
It might still be a block but it os going to be a lot smaller if you
put 7000 PSI on it.
My guess is it is mostly cellulose and that is made up of "cells" full
of air. They are strong enough to deal with one atmosphere but when
you start getting up over 400 BAR they will take a beating.