Best way to store currency for long term

[dheer]

I am looking at ways to store currency from long term [10 - 20 years horizon].
I have few modern currency that I would like to stack them together and put it away for long term, to be opened after say 10 to 20 years.

Right now I am clubbing all [around 50-60] the notes of same size together and putting them in a currency sleeve and keep the sleeve in an envelope in a drawer.

Is this safe? What should I keep in mind? Do packing the notes tightly spoil their color / or make them brittle? How does humidity affect them.

[Sicador]

for long term perspective it is better to keep each banknote separately & preferably try to use mylar, I have seen few older proof/unc sets which come in plastic and has degraded even the coins, ex 1969 india proof set, 1947-53 unc set pakistan. There are few plastic sheets which has acid and chemicals can damage notes, you can get a sharp smell out of those plastic sheets. I bought few in India and then just replaced with mylar..

Banknotes are just paper, after lot of research I'm now using following mylar sheets:

http://www.oregon-pioneer.com/gpage2.html

I posted the same on a similar thread in this forum.

go for Mylar 5 x 8, even our hyderabad 100 rupee fits in it perfectly and still leaves some room..

I have seen these with many dealers in US.

[Dux]

Hi All,

  The mentioned website for mylar sheet is not operational now.

  http://www.oregon-pioneer.com/gpage2.html

  Do we have any other website to buy mylar sheets, other than ebay.

Cheers,
Sanil