Are poster tubes acid-free?
Well, they can be but they are usually not. Most tubes used to deliver Jazzfest, Crescent City Classic, etc. posters are not acid free. In fact, they are quite often very high in acid content. Posters should not be stored for prolonged time in tubes. So get them out from under your bed and do something with them! My 1978 Strawberry Festival poster has brown spots on it. What is that and how can I get rid of it? Sounds like you are describing “foxing.” Foxing is a discoloration of paper characterized by dull rusty spots or patches which can be attributed to mold growth or impurities in the paper. The condition may develop or be accelerated if paper is exposed to extreme light or dampness. I also think prolonged storage in tubes can cause it. Sorry, there is nothing you can do about it. Too bad, too, because that Bahm/Patenotte poster is worth over $500 and it’s a really nice piece of graphic art. What is yours worth? It must have some sentimental value to you. I hope so because that’s w
