Hi ya'll, I'm not a pen enthusiast in particular, but I am an art teacher and I love doing calligraphy / hand letting units with my students. ive been gifted what amounts to over 6 gallons of Sheaffers Ink in various colors and sizes, from 2oz. Bottles to 32oz. Refill bottles. Alll are unopened and were even still in the original shipping boxes, which were deteriorating badly & needed pitched. I've opened a few and been testing them with a water brush and experimenting with them as I would with watercolors for some interesting results. Wondering if these are safe to use with preteen/teens? They're old, is there any ingredient in them that has since been deemed hazardous or an allergen that I should be aware of before using them in a public setting? And, do,you have any ideas for using this mass amount of ink? I'm gifting some to the non-profit arts org that I work with but truly between the two of us, it'll take years to use it up. I'm looking for ideas! Thanks!! Here's a little video montage of all of these bless filled with bottles of beautiful ink!