I know *exactly* the haze you're talking about.
It's definitely characteristic of those '50s Emarcy/Mercury vinyl pressings. I've always thought it was an organic reaction precipitated, or at least exacerbated, by some wear. I've seen it with only a few other record labels over the years, and never so much as with those '50s Emarcys.
It seems like an intractable problem, either way: no amount of wet or dry cleaning has ever produced any difference in my experience, darn it all.
> Date: Mon, 30 Nov 2009 15:31:52 -0500
> From: [log in to unmask]
> Subject: [ARSCLIST] Pressing Haze: Help Needed
> To: [log in to unmask]
> I own an otherwise flawless copy of the following LP:
> Clifford Brown and Max Roach at Basin Street
> Mercury MG-36070 (Black and Silver "Drummer" Label)
> While the overall condition is quite nice the A side of the record has
> what appears to be a grey haze (when viewed from an angle) that covers
> all of the first track and two thirds of the second track, the rest has
> a typical bright gloss. The hazed portion plays terribly with a lot of
> background noise, when the haze ends the record instantly sounds
> beautiful. What is this, what caused this and can it be cured? My guess
> is that It cannot which is a shame. Luckily, I have another very clean
> Japanese pressing to listen to. Has anyone else encountered this before
> and if so what were your conclusions?
> Thanks in advance and I hope everyone in the US had a restful holiday
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