It's no longer the 60's and acid is not acceptable! Picture Framers of the 60's through the 80's commonly framed artwork with paper mats. Today there are no excuses for framers to use paper mats and it's our responsibility to make sure our clients know the difference.
All mat board is not created equal. Read more here: plus.google.com
Do you have reframing stories? We would love to hear how your custom framer educated you on the acid issue.