For the Montreal West Artist Showcase current exhibition, I had some very large collages printed (almost 24" by 72"). Now the question was how to hang them. I decided to put on foam core; but how to attach as I couldn't find any acid free glue on such short notice. I found some double sided tape and was happy until the next morning when they had all but detached themselves. At this point I used some strong glue, but just where I had a white border.

Is this concern for archival quality professional or narcissistic? and does anyone know what it means if the glue has acid - will it eat through in 100 years or two weeks?

Hard for me to imagine the bohemian artists of Paris in the 20's caring about any of this!