Best type of vacuum seal bags for frozen kelp?

[grace_collery]

Question from a farmer in Alaska: do you know the type of vacuum seal bags that are best for frozen kelp? Do they need to be more than 3 mil? We are trying to identify which bags make the most sense for frozen seaweed, and what dimensions are needed to fill with 1 lb. of frozen kelp. Ours will be a blanched, frozen, whole leaf product mostly sold in Alaska. 

GreenWave: The guys at QFreshLab had the following advice: 

• Not all plastic is the same: there is a different kind of plastic used for a bag that is just going to be vacuum sealed, vs. something that is going to be vacuum sealed and frozen, vs. something that is going to be vacuum sealed, frozen, and then cooked in the bag. So, get as specific as possible about your use case and reach out to a sales rep at the manufacturer if you're unsure whether you've selected the right bag for your use case
• 2.5 mm would probably be fine if you were just going to seal but not freeze, but because things get 'sharp' when you freeze them you probably need 3 mm for that use case
• Consider whether you're freezing the kelp "fluffy" or in a kind of chopped slurry, like Atlantic Sea Farm's ready-cut kelp product. They sell a 12-oz box containing three 4-oz packs which fit into 8"x6" vac bags. They're pressed very thin, maybe half a cm thick, and are very rigid (unlike, say, the frozen chopped spinach you buy in the grocery store)