We have all seen 78s with radial cracks which are called shrinkage cracks. I have always believed that this type of cracking was accelerated if not caused by storage in extreme cold. The humidity issue is also a very real problem. It can ruin record surfaces, paper labels, and tapes over time.
Quick answer, you can store these items in non-climate controlled areas subject to heat and humidity extremes, but don't expect them to emerge in the same condition you put them in, especially if this storage continues for more than one season. (Film, on the other hand, likes to be kept cold and dry).
From: Association for Recorded Sound Discussion List <[log in to unmask]> On Behalf Of Jon Samuels
Sent: Tuesday, October 27, 2020 4:22 AM
To: [log in to unmask]
Subject: [ARSCLIST] storing shellac records, open reel tapes, etc. in very cold weather
A friend of mine asked me a question I was unable to answer, so I thought I'd ask if anyone out there has any specific knowledge. He's storing shellac pressings, open reel tapes, CDRs and DATs in an unheated garage in the Northeast of the U. S. Temperatures in Winter can go below 0 degrees Fahrenheit, and are often in the single digits above 0. The materials are stored in heavy duty, sealed plastic boxes. Will any harm come to any of the materials by being stored in Winter in that environment? He currently has no other place to store this material. I'd like to give him some wise advice, if I can.
Thanks in advance.