Hey Phil, Thank you for this extremely interesting test. To your point about companies using the term “mylar” to describe their bags. I contacted a company a couple months ago (unfortunately I don’t remember who) because they said they sold mylar bags. I asked them if their bags were really mylar or if they were using “mylar” in the same way we use Kleenex and Xerox nowadays; as a generic term. And they said they were using it as a generic term. At least they were honest about that.
It was so frustrating trying to do comparisons on "Mylar" bags for that very reason. I guess I should have taken the initiative to do what you did. Fortunately I made the decision to come to Phil's before resuming my search today. No doubt he's saved me many hours of searching.
04:25 - Tensile test rankings 14:15 - Burst test rankings Phil, I would like to see a test with StayFresh mylar bags. StayFresh places their labeling, similar to HarvestRight, on the mylar bags; which means it is possible the bags are from one of the other brands already listed. Another request would be to show a strength-to-price (burst strength per tensile strength per USD) ratio to show what would be the "best" for the USD, at that time in the market. I think that would be beneficial allowing others to determine cost-risk benefit analysis. Thank you!
Never heard of Stay Fresh until now. I guess it's a matter of time for competitors to come into the market. Funny they sell bags but no oxygen absorbers. Thanks for the tip.
@ StayFresh is a freeze dryer company that’s been established in the market now for about two years. They provide some free stuff when purchasing their freeze dryer including Mylar bags, a bag sealer, and some other items. The company is based out of California. He’s the only owner of a freeze dry company I know that has a PhD relevant to the freeze drying industry
I'm more interested in testing the seams for 'Air Tight'. I'm more concerned with the quality of the manufacturing. We bought some inexpensive bags on Amazon and they turned out to NOT keep moisture out.
In all the testing I've done (Burst Testing) I have never had a manufacture seam fail or a secondary seam (my seam) fail. All fails have been from the center material. I prefer 7 mil. I'll tolerate 5 mil, but nothing thinner. Are you having a problem with foods clumping (sticking) together?
@tonyb33168 make sure your food is completely dry. The only real way to tell is to weigh your trays when finished, put them back in for 2 hours, then weigh again. If any have lost weight, put them in for another 2 hours and then weigh again. Do this until extremely small amount of difference in weight per tray.. I think it's 1 gram. Anything more than that and you will have moisture problems. I think Phil does this now, but school bus guy has been doing it a long time.
Hi Phil, can you put sandwich bags inside your mylar bags to separate the ingredients in the bag. Looking at making an omelette kit. Keeping, eggs and veggies and cheese separate. Thanks for the great videos. Extremely helpful.
Phil, please do a test on packfreshusa products. They have several offerings of claimed Mylar, including a Century brand that is supposed to keep food fresh for a hundred years. I’ve tired most of the bags you’ve used above and found packfreshusa bags to perform the best, although I doubt as good as the genuine Mylar you used in these tests. Thank you.
Interesting but the only things I'm really concerned with in a bag are the rates of ingress of moisture and oxygen over time. Harder to test, but they're the real reasons we buy the bags.
I believe, but this has not been tested, the twenty year shelf life of freeze-dried food is limited to these two issues. With time, oxygen will be able to find its way through the polyester film and behind that will follow moisture. I have seen Mountainland freeze dried food after 45 years. The carrots were white, but they still tasted like carrots. Much of the food lost its color, and some of the nutrients were not as strong. This test is ongoing.
Dryness may be more important for long-term storage, however, if there is any oil, and most food has oil, oxygen is the reason for oils to go rancid (oxidation).
I would gather from your tests here, that the addition of the aluminum layer weakened the bags in both the tensile strength and how much internal pressure they could withstand. I would not rule out the plastic being used in any of the bags as being other than mylar without testing a known true mylar with an aluminum layer.
Does Mylar have a machine direction and a cross machine direction? In other words does it have a grain? One would expect the machine direction to have a MUCH greater tensile strength than the cross machine direction. I was wondering about the Mullen strength so your burst test answered that. You did not test PackFresh USA and they are my 'go to' retailer. 🥲 You gave me some questions to ask them.
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Hey Phil, Thank you for this extremely interesting test. To your point about companies using the term
“mylar” to describe their bags. I contacted a company a couple months ago (unfortunately I don’t remember who) because they said they sold mylar bags. I asked them if their bags were really mylar or if they were using “mylar” in the same way we use Kleenex and Xerox nowadays; as a generic term. And they said they were using it as a generic term. At least they were honest about that.
Yup, that's the problem, too common a word
@@Philat4800feet can you give us your opinion on Tray Grids for Harvest Right Freeze Dryer Trays?
It was so frustrating trying to do comparisons on "Mylar" bags for that very reason. I guess I should have taken the initiative to do what you did. Fortunately I made the decision to come to Phil's before resuming my search today. No doubt he's saved me many hours of searching.
Very important information. I had no idea. Thank you!
04:25 - Tensile test rankings
14:15 - Burst test rankings
Phil, I would like to see a test with StayFresh mylar bags. StayFresh places their labeling, similar to HarvestRight, on the mylar bags; which means it is possible the bags are from one of the other brands already listed.
Another request would be to show a strength-to-price (burst strength per tensile strength per USD) ratio to show what would be the "best" for the USD, at that time in the market. I think that would be beneficial allowing others to determine cost-risk benefit analysis. Thank you!
Never heard of Stay Fresh until now. I guess it's a matter of time for competitors to come into the market. Funny they sell bags but no oxygen absorbers. Thanks for the tip.
@ StayFresh is a freeze dryer company that’s been established in the market now for about two years. They provide some free stuff when purchasing their freeze dryer including Mylar bags, a bag sealer, and some other items. The company is based out of California. He’s the only owner of a freeze dry company I know that has a PhD relevant to the freeze drying industry
Never thought I would enjoy this demonstration, but I did, thanks.
Deep down inside everyone likes to blow things up
Thanks for testing biggest bang for the buck.
I wish i had seen this before i ordered over a hundred dollars in Wallaby bags!
The bags are good. The oxygen absorbers are marginal. I would vacuum seal your bags using an oven or freeze dryer.
@@Philat4800feet thank you. What brand of oxygen absorbers are good ones?
@@47retta So far the best are from Distribution Services (see the video for more info)
@@Philat4800feet thank you!
Great video. I know how much time it takes to put everything together. Appreciate your time
Great engineering. Fyi my dog runs into the room for the intro squeaker plays. We're enjoying the videos. Thanks
My dog too
Mine too!😂
Thank you for showing this information!
Thanks again for all you do Phil!
Thank you for sharing this valuable information! It takes a lot of time to make these videos.
It can get addictive
Good information Phil.
Thank you for sharing your knowledge.
You channel is the best for cold hard facts and no fluff!!! I would like to see Azure Standard bags and oxy absorbers tested.
Not a fan of zipper bags, but perhaps I could do that.
Their oxygen absorber are made by Oxy Free. I have tested them. They're pretty good:
ruclips.net/video/3OTw4gIjO2s/видео.html
Thank You Phil!!!
It seems a puncture test is most important due to internal food punctures from vacuum sealing.
I would agree, the the burst test was the most fun
I'm more interested in testing the seams for 'Air Tight'. I'm more concerned with the quality of the manufacturing. We bought some inexpensive bags on Amazon and they turned out to NOT keep moisture out.
In all the testing I've done (Burst Testing) I have never had a manufacture seam fail or a secondary seam (my seam) fail. All fails have been from the center material. I prefer 7 mil. I'll tolerate 5 mil, but nothing thinner. Are you having a problem with foods clumping (sticking) together?
@@Philat4800feet obvious signs of moisture. Fat not involved.
Veggies and candies.
@tonyb33168 make sure your food is completely dry. The only real way to tell is to weigh your trays when finished, put them back in for 2 hours, then weigh again. If any have lost weight, put them in for another 2 hours and then weigh again. Do this until extremely small amount of difference in weight per tray.. I think it's 1 gram. Anything more than that and you will have moisture problems. I think Phil does this now, but school bus guy has been doing it a long time.
ALWAYS so helpful’
I find this very interesting since everyone on social media keeps pushing Wallaby mylar bags. Thanks for the info.
Hi Phil, can you put sandwich bags inside your mylar bags to separate the ingredients in the bag. Looking at making an omelette kit. Keeping, eggs and veggies and cheese separate. Thanks for the great videos. Extremely helpful.
Great minds think alike. Yes you can. Check out these videos:
ruclips.net/video/CbrUSFGaNqE/видео.html
ruclips.net/video/P1Qqg4j41Ms/видео.html
Phil, please do a test on packfreshusa products. They have several offerings of claimed Mylar, including a Century brand that is supposed to keep food fresh for a hundred years. I’ve tired most of the bags you’ve used above and found packfreshusa bags to perform the best, although I doubt as good as the genuine Mylar you used in these tests. Thank you.
Soon.
Seconded - please do Packfreshusa!
Third request!
4th request. Want know where they fall on your list.
Would love to see the test for Avid Armor bags.
4.5 mil. Hmmm, are you temping me???
Absolutely! I love their compression sealer and was curious if their bags are good.
If you do a puncture test, I would be interested
We will see
I am hoping for a test on PackFreshUSA bags and oxygen absorbers. I would be happy to pay for a sample kit to be sent to you for testing if that helps
I just finished the video. Should be posted in 24 hours.
Interesting but the only things I'm really concerned with in a bag are the rates of ingress of moisture and oxygen over time. Harder to test, but they're the real reasons we buy the bags.
I believe, but this has not been tested, the twenty year shelf life of freeze-dried food is limited to these two issues. With time, oxygen will be able to find its way through the polyester film and behind that will follow moisture. I have seen Mountainland freeze dried food after 45 years. The carrots were white, but they still tasted like carrots. Much of the food lost its color, and some of the nutrients were not as strong. This test is ongoing.
Very educational TY!
Packfresh usa isnt in the list?
Packfresh makes great oxygen absorber. I don't think they produce Mylar film.
@@Philat4800feet you did a test in your videos mylar bags of packfreshusa.why you saying they dont have?
Thanks Phil! Isn't oxygen impermeability the most important property for long term?
Dryness may be more important for long-term storage, however, if there is any oil, and most food has oil, oxygen is the reason for oils to go rancid (oxidation).
Awesome
Thanks Phil!! ❤❤❤ your videos!! Can you tell me where to purchase DuPont bags?? I went to their website and couldn’t find mular bags..
DuPont only makes the film (Mylar) and sells it to those who form the bags...sorry
I would gather from your tests here, that the addition of the aluminum layer weakened the bags in both the tensile strength and how much internal pressure they could withstand. I would not rule out the plastic being used in any of the bags as being other than mylar without testing a known true mylar with an aluminum layer.
I would think the opposite. Mutiple layers should strengthen the film.
I think you can seal all those bags and use them!
Funny
where can we get the actual Mylar bags?
Have them made at a tremendous cost. They may be out there, It would take a lot of searching.
🙏
Hey Phil.....
Can you do a test on Tekunlimited mylar bags. I'm not sure if you already have... I got the bags from Amazon.....
I'll look into it
Their website only sells five gallon bags with 2000 cc oxygen absorbers. The Amazon link shows the same. Sorry, I don't use five gallons bags.
Do you have a link for the VALVE you used on the mylar pouches?
Not sure I understand the question?
👍👍👍👍👍
I cannot find, Distribution Services? Can someone post a link?
store.churchofjesuschrist.org/?y_source=1_MTAwNDU1NTUzOC03MTUtbG9jYXRpb24ud2Vic2l0ZQ%3D%3D
@@Philat4800feet Thank you!
@@Philat4800feet Only 3 items. No bags availlable
Does Mylar have a machine direction and a cross machine direction? In other words does it have a grain?
One would expect the machine direction to have a MUCH greater tensile strength than the cross machine direction.
I was wondering about the Mullen strength so your burst test answered that.
You did not test PackFresh USA and they are my 'go to' retailer. 🥲 You gave me some questions to ask them.
Now you have me wondering why I haven't tested PackFresh USA???
Yup, I did test their product:
ruclips.net/video/gT-IsviIA04/видео.html
Great video. I know how much time it takes to put everything together. Appreciate your time
I appreciate that!