I know exactly what Ehaller means by 'warped' sleeves. I had the same experience, even with the more expensive Nitty Gritty Poly Sleeves I purchased from Music Direct a couple of years ago. I returned them at my expense and requested MFSL sleeves instead. Aftermarket paper sleeves are simply not the quality of the EMI, DGG, Decca and Philips of the past.
I stick with MFSL and Bags Unlimited's rice paper sleeves.
If one still prefers a polylined paper sleeve, I have found the ones manufactured by Bags Unlimited to be the most flat with the best fit and finish.
I stick with MFSL and Bags Unlimited's rice paper sleeves.
If one still prefers a polylined paper sleeve, I have found the ones manufactured by Bags Unlimited to be the most flat with the best fit and finish.