Post by guanfeng on Jan 8, 2020 9:00:38 GMT
Freeze drying food is not a complicated process, it’s quite simple actually. Some people choose to do this with the help of vacuum sealers, and if you can get one I highly recommend it. They draw out most of the moisture, which is very important.
But many people freeze dry food without a machine, and there are two ways to do that.
1. The simple freezer method
The easiest way to freeze dry food is the one that also takes the longest. All you need to do is place your food in small pieces on a tray such as a cookie sheet, or a cooling rack or air drying rack and simply put it in your freezer. A deep freezer works best.
The food starts to freeze in the first few hours itself, but the drying process takes weeks. This process is known as sublimation. This is what separates freeze drying from simply freezing food inside of sealed bags or containers like we’re all used to doing.
The best way to check when the food is done drying is to remove a frozen piece and let it come to room temp. If the food turns dark or black, it means the drying process is still not over. Frozen food that doesn’t change color has been freeze dried thoroughly. It’s more an art than a science.
Once that has been achieved, you can go ahead and store the freeze dried food in ziplock bags. Freeze-dried food should be kept in storage that stays under 75 degrees.
2. The dry ice method
You can also freeze dry food with dry ice. Dry ice lets all the moisture from your food evaporate quickly, so the whole process is much faster. Find a day when the humidity level is zero too, don’t try this method when it’s rainy out as the humidity will make it much harder.
You will need a pair of insulated gloves and a large container, about twice the size of the food that you want to freeze dry. Completely cover the food with dry ice and fill the container, use a 1:1 weight ratio (meaning 1lb of food should get at least 1lb of dry ice). DO NOT SEAL THE CONTAINER…it will explode.
Dry ice gives off a large volume of gas as it evaporates and it has to be able to escape. You can loosely put the lid on, or drill holes in the lid, but do not seal it. I just leave the lid up.
More information about How To Freeze Dry Food Without A Machine, please check gf-machine Manufacturer is your specialist in drying techniques and all your partner for freeze dry machinery. The great variety of drying processes enables Guanfeng to always give good and honest customized advice and help you decide which machine best matches your requirements. More information about How To Freeze Dry Food Without A Machine, please click www.gf-machine.com/solution/frozen-solution/ , here more Frozen Solution ways, welcome visit our site.
But many people freeze dry food without a machine, and there are two ways to do that.
1. The simple freezer method
The easiest way to freeze dry food is the one that also takes the longest. All you need to do is place your food in small pieces on a tray such as a cookie sheet, or a cooling rack or air drying rack and simply put it in your freezer. A deep freezer works best.
The food starts to freeze in the first few hours itself, but the drying process takes weeks. This process is known as sublimation. This is what separates freeze drying from simply freezing food inside of sealed bags or containers like we’re all used to doing.
The best way to check when the food is done drying is to remove a frozen piece and let it come to room temp. If the food turns dark or black, it means the drying process is still not over. Frozen food that doesn’t change color has been freeze dried thoroughly. It’s more an art than a science.
Once that has been achieved, you can go ahead and store the freeze dried food in ziplock bags. Freeze-dried food should be kept in storage that stays under 75 degrees.
2. The dry ice method
You can also freeze dry food with dry ice. Dry ice lets all the moisture from your food evaporate quickly, so the whole process is much faster. Find a day when the humidity level is zero too, don’t try this method when it’s rainy out as the humidity will make it much harder.
You will need a pair of insulated gloves and a large container, about twice the size of the food that you want to freeze dry. Completely cover the food with dry ice and fill the container, use a 1:1 weight ratio (meaning 1lb of food should get at least 1lb of dry ice). DO NOT SEAL THE CONTAINER…it will explode.
Dry ice gives off a large volume of gas as it evaporates and it has to be able to escape. You can loosely put the lid on, or drill holes in the lid, but do not seal it. I just leave the lid up.
More information about How To Freeze Dry Food Without A Machine, please check gf-machine Manufacturer is your specialist in drying techniques and all your partner for freeze dry machinery. The great variety of drying processes enables Guanfeng to always give good and honest customized advice and help you decide which machine best matches your requirements. More information about How To Freeze Dry Food Without A Machine, please click www.gf-machine.com/solution/frozen-solution/ , here more Frozen Solution ways, welcome visit our site.