I’ve taken an upholstery class through IICRC and I’ve never heard of this before. What information does she think you’ll find out from the bar code? By law, furniture makers are not required to tell you the fabric content of the furniture, rather only the makeup of the cushion filling. Don’t know what she expects you to find out from the bar code on the tag. About the only information you may sometimes find on tags are the “x”, “s” and “w” which only tell you the stability of the dyes used (and subsequently they recommend a particular style of cleaning for that code). If you (and she) are still concerned, find the manufacturer of the furniture and call them and see what, if anything, the bar code will tell you.