Reddit reviews Ziploc Double Zipper Freezer Gallon Bags, Total: 152 Bags (4 X 38 Count)
We found 3 Reddit comments about Ziploc Double Zipper Freezer Gallon Bags, Total: 152 Bags (4 X 38 Count). Here are the top ones, ranked by their Reddit score.
Extra thick plastic protects food in harsh freezer environment.. Double Zipper, our tightest seal ever.Ziploc Double Zipper Heavy Duty Freezer Bags sealed in freshness and lock out freezer burn with two zippers that close easily together for a secure seal.. Double Zipper closure helps seal in freshness and lock out freezer burn with two zippers that close easily together for a secure seal.Contains four 38-count packs, total of 152 bags.
I've been using SV for a couple months now. I use gallon or sandwich size ziploc bags. Every time I SV, there seemed to be more liquid in the bag than there should have been. I read some comments that there shouldn't be that much liquid just from the ingredients (from other videos/threads). My SV container also consistently smells of the ingredients inside the bag, so I decided to test out whether the bags are actually permeable to water specifically in this test.
I wanted to see if ziploc bags would let in water while cooking, and if so, if a hypotonic system cause faster/greater water entry. I used two gallon ziploc bags, one with ~two tbspn salt and the other with nothing. I used water displacement to remove air from the bag with salt, and the empty bag I left sealed from the box. I heated up my Anova to 135F and left the bags in for 15 hours, weighed down with magnets.
As you can see from the image, both bags let in water. The bag with salt let in significantly more water; you can't easily tell from the image, but the bag with salt is significantly wider due to the amount of water in the bag. I did not weigh the bags beforehand, as I wanted to do a qualitative test. The bag with no salt had about a tablespoon of water inside. The bag with salt had three-four times that volume.
Tl;dr - I can conclusively say that gallon ziploc bags are permeable to water, and the tonicity of the system has a significant effect on how much water is allowed into the bag.
Gallon ziploc bags and sandwich ziploc bags seem to have different thickness, so I may try this again to see if there is a difference between the gallon bags and the sandwich bags in terms of water permeability. I may do a quantitative test as well comparing various salt levels, temperatures, times, and even salt concentration in the SV container...if I'm not too lazy. If someone would like to try my experiment with a vacuum seal system or with silicone bags, I would love to see those results.
I hope this is helpful for those of you who are deciding whether to use ziploc bags, vacuum bags, or any other bagging system. I, however, must go through another 3.5 boxes of ziplocs before I consider switching to something else. Cheers!
Edit: These are the Ziploc double zipper freezer gallon bags.
And to think I use a Zpacks toothbrush kit. 'Sok someone is going to faint now.
20 grams - holy shit, I almost collapse onto my knees everytime I put this in my "clean" bag.
OMG My clean bag weighs 8.5g.
Gotta take a leak so I don't collapse again.
I use bags like these and haven't had an issue yet with them leaking. Even cooking around 80C they've held up, but sometimes I double bag it.
I think the temp you were cooking at is the higher point for them though, but if you're under 60C you should be fine with them.
Edit: added link to freezer instead of storage bags