[Gianni01]

But if I do the dry ice method this Friday, do you think it will be fine with the weekend to evaporate ? I use my real details and I will be frightened to fail in this method and get some problems with smoke at the post office.

If you're concerned with storage time, do It on Monday.

Should I put the dry ice in the original box and a second box in the original box to avoid smoke ? or Can I use an other box than original ?

Place cardboard around the dry Ice.

@mothered thank you for all ! can you just confirm me if it's ok please ?

So I'm using the original box and insert an other box inside with dry ice that I'll buy it at the shop 30min or 1 hour before entering at the post office to return the box, right ?

The seller will receive it on the next day, it's perfect right ? to not let any vapor inside ?

Should I put exactly 1,80 kg (weight of book) of dry ice or can I put 2 kg or a little more of that ?

Thanks for your answer which help me a lot !