"Oxidation" is an incorrect term. Oxidation is the absorption of oxygen by certain metals like iron. There is no metal in the orange inks. The correct term is "sulphurisation".
As for cleaning stamps, I find that using ammonia works much faster, and is much better at achieving the desired results than using dish detergent. Of course everyone has their favorite methods, but give a stamp an ammonia bath and see the results. Always try it first with a cheap, disposable stamp.
I picked this book up just to add to my library. I have no plans on stamp restoration. My limited experience is with a few drops of dish detergent to clean up a very dirty stamp or using peroxide to try and reverse oxidation on orange colored stamps. i scanned the back page with a list of chemicals to use, not sure if they are still available to the consumer.
re: The Dealers' Guide To Chemical Restoration Of Postage Stamps
"Oxidation" is an incorrect term. Oxidation is the absorption of oxygen by certain metals like iron. There is no metal in the orange inks. The correct term is "sulphurisation".
As for cleaning stamps, I find that using ammonia works much faster, and is much better at achieving the desired results than using dish detergent. Of course everyone has their favorite methods, but give a stamp an ammonia bath and see the results. Always try it first with a cheap, disposable stamp.