Stitching Vinyl Lp Pressing Defect

Vintage records can look in excellent condition but be noisy due to use of impure vinyl and old cost cutting practice with some plants.
Stitching vinyl lp pressing defect. Stitch length for sewing vinyl. Pressed 7 vinyl available as 33 or 45 rpm. Vinyl and jacket are in overall very good condition. No they don t but their quality can t be denied.
Non fill refers to a pressing defect that occurs when the molten vinyl does not flow fully to produce a well formed groove. The vinyl of the two companies i mentioned have not been subject to any defects and sounds fantastic. Sometimes you have an entire bad breakfast. Mint and sealed record can be less than perfect.
In a hydraulic press fitted with 2 pre heated moulds and fitted with stampers the pre heated vinyl matter is inserted into the machine sandwiched between two completely dry labels. There is and was no suspect qc on those pressings. Do they compare to a 45rpm mfsl. The sound produced is noise a shsssshing sound that we ve all heard too often.
It occurs most often on a 180g record s outer edge and is caused by the vinyl s beginning to harden prematurely. This was the problem that plagued classic s early 200g quiex sv p flat. Complete package includes lacquer mastering pressings standard black vinyl record pressing color lp labels unprinted inner sleeves upc barcode and 7 full color jackets printed on 15pt white boards. There s a few dodgy ones to start.
I m assuming this is a result of a pressing defect because i have ordered two copies of this lp from two different distributors and both copies feature this identical flaw. Pressing vinyl is something of a lost art. Record players with a heavier needle seem to play through this issue better. Think of your stitching as if there were no thread in the holes created by the sewing machine needle those holes become a tear strip which will weaken the vinyl and make it prone to tearing.
Your stitch length when sewing vinyl fabric should be longer than you would use on regular fabric. Once the pressing process is started the labels and vinyl matter are pressed under a pressure of 100 or more tons at a temperature of 160 c 345 f for a precise. New reissues can have surface noise due to defects in modern manufacture. This release was limited to 500 un numbered copies.