Posted: 8/2/2009 4:43:03 PM EDT
|
Hello All,
Having major difficulty doing a seemingly easy task. I cannot get the air out of my mylar bags. I am using the LDS 7 mil mylar bags. I have got 2 of 50 to actually suck down the air and form around the food. I am using a whooping 3 1500ml o2 absorbers from LDS and 2 of the 1500cc sorbent 02 absorbers (yup thats 5 o2 absorbers per mylar bag (1 galllon bag) I then took some of the bags that had air and submerged them overnight and all product upon opening was dry. So its not the seal. Also put some of the o2 absorbers in mason jars and they sucked the lids down. In my last experiement the o2 absorbers went from factory backage to the sealed bag in under 2 min. Any ideas what is up. It seems like I have eliminated the seal and the o2 absorber. They are only 1 gallon bags so the o2 absorbers shoulda done the trick concidering I put in 5x the recommended amount and there is not all tha much air in the bag to begin with. Thanks! |
|
Honestly, I have never put away food like this, but I'm planning to.
However –– just how "sucked down" can these things get? Oxygen only comprises 20.9% of atmospheric air, thus if you remove all of that, there's still 79.1% of the original volume left over that wasn't absorbed by the O2 absorbers.... I suppose what I'm trying to say here is that O2 absorbers can only physically absorb ~21% of the volume of gas in whatever container they are in. ...just a thought. 
|
|
Try these tips from my past mistakes.
Put your food in the mylar. Make sure your ironing board is very smooth. Use a clean towel and wipe inside the mylar. Dust from pouring the grains in, collect there. Then seal all but the last three inches of your bag. Do all your pails like this taking your time with the iron. 7mil bags need 400F 40psi for one second. With a cloths iron that's alot. So take your time. I used a laser thermometer and found that the bags rapidly drop the temp of the iron. Next plan on ten pails at a time. Order your new oxyies from Sorbent Systems. They come sealed in ten packs. Fold all the mylar's down on top of your food. Open your Sorbant oxyies, then slip one oxy into each mylar. Force out as much air as you can and with your four inch long ironing board. Seal the last three inches of mylar. Remember to let the iron get back up to temp for each bag. Also be careful of the irons point. You don't want to plow holes in the mylar. Good Luck SB |
|
I don't think you'll ever have any luck having an oxygen absorber actually remove the air from the bag after filling and sealing it and causing the contents to "self vacuum".
The method I use is as follows: 1.) Fill up 10 mylars with the goods 2.) Seal all bags except a 3" opening on one end of the bag 3.) Open a 10 pack of oxygen absorbers and throw one in each 4.) Insert the vacuum hose into the 3" opening in the bag and suck out what air remains 5.) Grab your heat-sealer and as soon as you remove the vacuum from the bag, seal the bag. My stuff is packed so tightly it's actually like a freaking brick. |
|
Quoted:
I don't think you'll ever have any luck having an oxygen absorber actually remove the air from the bag after filling and sealing it and causing the contents to "self vacuum". . Every time I've done it the oxygen absorbers created a strong "self vacuum" I could see the beans shape through the mylar it was suctioned so tight. I see no need to use a vacuum on it first. I just use my hands to push the mylar bag down on top of the food, toss in a couple absorbers and seal. |
|
odd. from what i have heard dont O2' abosrober really make nitrogen when they work, displacing the o2? or some fancy sceintific ec=mabc2 or some BS lol I just use what works, not really into teh science of it all LOL. But a bag that small with that much o2's in may have the reverse effect and if fact stay "blown up". 1 gallon bag should only need 1-200cc's i think. sides that,you gotta push out the rest of the air, seal good and wait. 24hours normally. They wont be coffe brick hard,but pretty damn close to it. |
| I had this same problem. About 1/2 of my bags sucked in so much you could see individual beans and such. The other half ended up being 7mil mylar balloons. Seals were fine.....and I threw in TWO 2,000 cc absorbers for EACH 20x30 mylar. Doesn't make any sense, except perhaps one of the batches of absorbers was bad. |