Dehydrating: Set your dehydrator to 130°F (54°C). If using an oven, set it to the lowest temperature and prop the door open slightly to allow moisture to escape.

Allow the dehydrated carrots to cool completely after drying them. Place the cooled dehydrated carrots in airtight containers ...

As well as being a strong acid, sulfuric acid is also a dehydrating agent, meaning it is very good at removing water from other substances. There are two examples you need to be aware of.