I have a metal case with Pelican camera foam inside which I have custom made for my Elan 7e, various lenses, flash, and other accesories. I am aware that any tape other than "acid free", or "archival" contain chemicals that can fade pictures or even destroy them over time, but do these same chemicals affect camera EQIPMENT? I would like to tape a ziplock bag to the top of the inside of my case so that I can keep all my manuals and documentation with my camera. The "archival" tape is rather flimsy and I do not think it will hold up but I am unsure if the duct tape is safe even though there will be a layer of foam between it and the equipment. Any answers you might have would be greatly appreciated. Also, is this setup appropriate for long term storage or do I need to put some silica packets or something inside to prevent moisture?