I have tried foamcore on occasion, but have not been successful to my satisfaction. I hinge-mount "plastic" prints (thinking of adding this technique to my site's article) to foam board and "overmat" them. Foamcore was not considered archival the last time I looked at it – admittedly a few years ago, despite the fact it may be skinned with buffered paper. So that pretty much precludes using it as an archival technique.
Originally Posted by walbergb