I did this a few years ago and found my old post from a message board so I could save it on my blog. It's from March 2022. I had been mulling over the issue of acid-free (or not) glue for scrapbooking. My conclusion is we've been 'had' and it's not necessary to spend a lot of money for glue. Some people don't think it's scientific enough (like the fact that the pen was designed for paper) but as far as I'm concerned, seeing as there's different results with different products, I'm not sure the 'testing equipment' used makes all that much of a difference. (Like, do you people really think there'd be totally different results if I'd used litmus paper instead because they are liquids?) You're free to consider these results I got or blow it off and do your own thing. Makes no difference to me but thought I'd share for the sake of others it might matter to.
For reference (as you can see in my note below about the package being definitely acidic) - the more yellow, the more acidic. Purple is considered 'acid free'. (the package actually said yellow or clear is acidic but I've never seen anything I've used it on be clear.)
I have an OLD pH pen from Fiskars but it still works. I started scribbling on different stuff. Then I made a little blob of the Aleene's original and their (supposedly) acid free. Let it dry and tested the pen. Tried it again, same results.
I made an 'official' swatch. 😉
Here's the results, with the back of the package sampled, too. (Definitely acidic.)
My camera coloring is off but the results are obvious. The Aleene's 'acid free' is the worst.
This was my original sampling on copy paper above the 'official' swatch. I'm still not over the Aleene's 'acid free' being the opposite!
