I figured I'd make a post here about the risks involved when using the Vinyl Flat.
Some things to consider. I've had some variant of Vinyl Flat and Groovy Pouch for almost 10 years. Looking back at some old posts on Audiokarma, it seems my first flattening session was August 2012.
Since then I have had only one record damaged out of probably 200 to 300 records flattened, and it happened to be an
Orville Peck - Pony in a stack of records I'm flattening for
@highqualityrecords
I have read about issues with multicolored records, but never had issues myself. From what I've read the theory is that different colors have different melting or softening points. That is entirely possible, but again, this is the only time I've had an issue.
This record was just originally a simple slight warp.
My camera didn't really pick it up too well, but there was some daylight under the record every rotation.
I started the first session at an hour. I got up to a 5 hour session with no real change. The 6 hours session melted it.
This is the record today.
I really doubt it's fixable at this point.
I felt like this should be posted so people know the risks involved. If something is playable with a warp, then is the risk worth it? One in 300 doesn't sound like bad odds, but it sucks for me and the owner when damage does happen. If the warp is playable and doesn't make any audible changed in sound, then I really don't see the need on taking the risk. Especially with the more expensive variants, as getting a replacement may be too expensive or just hard to find. And all the mixed colored vinyl of today being a possible issue.
My current bag is one that only has 1 heat setting, so I don't know if it just got too hot or what. I have a thermometer that measured it at around 144 degrees Fahrenheit, but I don't really know if this is higher or lower than other peoples bags.
If you are weary of risking it, I would suggest hitting Barnes And Noble and find 2 copies of some huge 13" x 13" book. Sandwich the record between the 2 and forget about it for a month or 2. You really don't need heat to take out a warp, it only accelerates the process.