Eli5: freeze drying. I just can’t wrap my head around how it gives different results even tho both take out water out of say fruit. And also how they evaporate in freezing environment

Question

Eli5: freeze drying. I just can’t wrap my head around how it gives different results even tho both take out water out of say fruit. And also how they evaporate in freezing environment

In: 27

Answer 1

If you let fruit dry at warm temperature it shrivels up when it loses the liquid water through evaporation.

if you freeze the fruit and put in in a vacuum the ice changes directly to water vapor gas in a process called sublimation. The fruit is frozen so it can’t shrivel up.