Etsy put up a nice guidelines post about framing artwork for the longest possible life and health of the work including paintings, photographs, prints, etc. The above photo was framed without a mat to separate it from the glass.
Tips on Archival Framing
Becky Stern is a Content Creator at Autodesk/Instructables, and part time faculty at New York’s School of Visual Arts Products of Design grad program. Making and sharing are her two biggest passions, and she's created hundreds of free online DIY tutorials and videos, mostly about technology and its intersection with crafts. Find her @bekathwia on YouTube/Twitter/Instagram.
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