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i bought a bolt from the store a few weeks ago that was from 2008. the fabric was fine.
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I had a bolt of white muslin stored on the original cardboard bolt for 20 years. If there was going to be an issue I think I would have seen it show up on pure white fabric.
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How about asking the manufacturers directly, and posting the answers? I asked a rep several years ago, and was told the cores are not acid free- that within 3 - 5 years problems with acid burns would show up. So wrapping the core with another fabric might not be of value long term. There are archival sprays for preserving newsprint- wonder if they would work on the thicker cardboard. Probably better to go with archival foamcore?
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You could always cover them with Contact paper...which IS acid-free.
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Here is a link and a quote from there in regard to storing on cardboard bolts.
http://www.freepatterns.com/content/content.html?content_id=614 "Hello! I work at a quilt shop and would like to pass on a tip. Please tell your readers to never store their stash on cardboard bolts as they are not made from acid-free cardboard. These boards will discolor your fabric if you let it 'age sufficiently on the bolts,' as my friend stated it. I hope this helps." |
Not an answer to acid-free ability but back in the day I was taught to wrap those cores in batting and muslin and use them for light weight portable ironing boards.
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If in doubt, wrap the cardboard in acid free tissue paper and then the fabric. I have fabric on the original bolts that are fine. I got the fabric second hand at a garage sale. The first owner had it for 5 years in the garage (her fantastic quilting room). The fabric is still strong and not discolored.
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