B Some questions about humidity and storing DVDs in a closed cardboard box

[carlos78]

If I have a dvd disk inside those plastic boxes suitable for dvd disks in black, if I have an electronic board inside a bag or papers inside any plastic bag and after that all of them inside a closed cardboard box when I closed the cardboard box or bag or dvdbox it was in rainy or humid weather or even dry but with some humidity but in rainy season the humidity entered the box, bag or dvdbox when that climate is changed from rainy and one gone to hot and dry (31-35C) is the moisture that is inside the cardboard box, inside the bags and inside the dvdbox evaporated or does this only happen if you heat them intensely? that is, does the change to a dry and hot climate dry or not these items of moisture deposited on them?

 

[hutchphd]

This is a diffusion question and the time scales depend upon the exact materials involved.

Sentences are a useful part of grammer.

 

[Baluncore]

... if I have an electronic board inside a bag or papers inside any plastic bag ...

Water molecules will move at different rates through plastic bags, depending on the grade of the plastic.

Dry plastic bags are brittle. Plastic is preserved by the presence of excess water, which is a plasticizer for PE.
Paper and cardboard act as a reservoir for water vapour, that prevents local condensation by virtue of the huge surface area of cellulose fibres.
That leads to a complex relationship.

 

[berkeman]

(Note -- this turns out to be a well known and prolific sockpuppet who seems to have mental fixations on humidity and his DVD/CD collection. Accordingly this latest sockpuppet has been shown the door.)