Is There A Way To De-Acidify Stamps?

Hello there from Trench Town,

I have read that dipping acidified paper in alkaline free water will reduce acidity.Is this true?
Also, since most of the acid in milk is in the fat, would dipping them in fat-free milk and then water help?
Are there any other ways to do this?

Would this help with old brittle American stamps? Or is that old glue?

I don't think that will help. The acid in paper is more or less bonded at a molecular level. If a stamp were a living thing acid would be in its genetic make-up so dipping a stamp would not strip away something that is engineered in naturally. The issue with lignin in paper is that over time it reacts with sunlight. So, keeping the stamps in an air tight, dark, low humidity environment will definitely prolong their lifespan. Also, once a stamp becomes brittle like that it usually means that the damage is already done. If, the stamp is particularly valuable I would get some good quality hinge-less mounts and mount them in a way that it would be impossible for them to slip out and not handle that much. Thats the best I can offer.

It seems you have been reading information on some dodgy websites. Here is a link to some accurate information (Library of Congress):
https://www.loc.gov/preservation/

You cannot reverse toning/acidification. There are products you can buy to prevent further acidification such as
http://www.subwaystamp.com/ARCHIVAL...o/ZPTWATTAM/
http://www.talasonline.com/deacidification

I assume that a sodium bicarbonate solution would also work but am unsure if this is an approved archival method.

I would add to rwarde post that lignin does not need light to generate acids in paper. Once any buffering has been depleted, lignin can break down in the dark too (i.e. with constant variance in temperatures and RH).
Don

Thank you as always for this information.

Amazon used to see a Duplicolor (the spray paint company) de-acidifying spray that was waaaay less expensive and just as effective as the higher-priced stuff. But I don't see it listed anymore. There must be some product out there that sells for less.