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Topic: CO2 absorbed too! >was Re: +Oxygen absorbers -- long (4 msgs / 105 lines)
1) From: Mike McGinness
Sorben Systems website doesn't mentioning anything other than absorbing
oxygen. However, the Fresh Paks themselves are labeled "oxygen & carbon
dioxide absorber". I read on their site that in food storage to fill
containers full or the oxygen absorbing can cave the sides because of strong
vacuum making it hard to get a lid off. They even take about drilling a
whole to relieve vacuum. However, fresh roast beans are releasing large
amounts of CO2. The small vac bags I made for testing showed initially the
vac only bags expanded faster. But the vac + Fresh Pak 4 weeks later seem
about the same expanded from CO2 release. The Fresh Paks seem hence
saturated, not necessarily by oxygen but the CO2! If FPaks being used in
single use vac storage packing then no biggy since the oxygen would be
absorbed before much degassing had occurred. However, if FPaks used in a
mason jar that is opened to remove beans to grind and re-vac'd only the
initial use of FPaks would be any good. After a day or two the FPaks would
be saturated... so re-vac'ing most likely simply back to 80% oxygen removal
unless a new FPak put in each time... I'm not going to that extreme. For
travel it wouldn't matter since I make up single brew size vac paks...
MM;-)
Variable Variac Rockin' Rosto Roasting
Miss Silvia brewin'
Limping along with Solis Maestro grindin'
Christmas is coming!!!
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

2) From: Mark A. Chalkley
So they only absorb x amount of either/or oxygen or CO2?  In other
words, they can become completely saturated in the presence of CO2, to
the point that they will no longer absorb any oxygen?
Mark C.
On Saturday, October 12, 2002, 9:31:30 PM, you wrote:
MM> Sorben Systems website doesn't mentioning anything other than absorbing
MM> oxygen. However, the Fresh Paks themselves are labeled "oxygen & carbon
MM> dioxide absorber". I read on their site that in food storage to fill
MM> containers full or the oxygen absorbing can cave the sides because of strong
MM> vacuum making it hard to get a lid off. They even take about drilling a
MM> whole to relieve vacuum. However, fresh roast beans are releasing large
MM> amounts of CO2. The small vac bags I made for testing showed initially the
MM> vac only bags expanded faster. But the vac + Fresh Pak 4 weeks later seem
MM> about the same expanded from CO2 release. The Fresh Paks seem hence
MM> saturated, not necessarily by oxygen but the CO2! If FPaks being used in
MM> single use vac storage packing then no biggy since the oxygen would be
MM> absorbed before much degassing had occurred. However, if FPaks used in a
MM> mason jar that is opened to remove beans to grind and re-vac'd only the
MM> initial use of FPaks would be any good. After a day or two the FPaks would
MM> be saturated... so re-vac'ing most likely simply back to 80% oxygen removal
MM> unless a new FPak put in each time... I'm not going to that extreme. For
MM> travel it wouldn't matter since I make up single brew size vac paks...
MM> MM;-)
MM> Variable Variac Rockin' Rosto Roasting
MM> Miss Silvia brewin'
MM> Limping along with Solis Maestro grindin'
MM> Christmas is coming!!!
MM>
MM> homeroast mailing list
MM>http://lists.sweetmarias.com/mailman/listinfo/homeroast">http://lists.sweetmarias.com/mailman/listinfo/homeroasthomeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

3) From: Mike McGinness
From: "Mark A. Chalkley" 
<Snip>
Don't know with absolute certainty, or any degree of certainty for that
matter! I just know from observing vac bags of fresh roast, they will expand
from CO2 even with FPaks. I don't know if the iron oxide can absorb oxygen
after CO2 saturation... I only suspect not. Guess I should contact Sorbent
Systems and ask:-)
MM;-)
Variable Variac Rockin' Rosto Roasting
Miss Silvia brewin'
Limping along with Solis Maestro grindin'
Christmas is coming!!!
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

4) From: TFisher511
Is it possible that the Sorbent packs really do only absorb oxygen? Maybe it 
is just the (CO2 - O2 = C) reaction. If you remove the oxygen from the carbon 
dioxide you leave only the coffee diamonds behind.
In reading the interesting and informative storage tests Mike sponsored, I 
think I remember reading that the packages with the Sorbent packs retained a 
better fresh ground coffee aroma. The difference in the flavor of the brewed 
coffees was marginally improved but the vac sealing was the real bang for the 
buck. That was a most excellent and informative experiment, BTW. I should 
have jumped on the offer:(
Terry F
mdmint writes:
<Snip>


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