Early MOFI vinyl formulation

Yes I remember that was not just true of MoFi but also Nautilis and other that claimed to be using "virgin vinyl".
Now we get the 180-220gm pressing and they are not transparent and I never see the term "virgin vinyl" used in product description. I don't think that means that we are getting "nymph vinyl" it's just not a selling point, as it was years ago. Also the MoFi pressing of earlier days were not 180gm so with a lesser thickness maybe light passed through better. Just a theory anyway.

As explained to me many years ago, so IIRC:

Virgin vinyl, as you might expect, is first use material. Later, it may be recycled for remanufacturing and reuse but, alas, it's no longer virgin. My understanding is that recycled vinyl requires a colorant to maintain consistent appearance, so it cannot be translucent. Virgin vinyl can be colored as desired; opaque, translucent, or even left transparent.

Yes, Theo...in the past, "virgin vinyl" is what we looked for in a record. And you could hear the difference.

These days, the buzz words are 180g, 220g. All that matters is that record is thick and heavy. If it's 180g, then it must sound better.

The vinyl was indeed made (and patented) by JVC. The trade name was Supervinyl and it was made using virgin material in a proprietary formulation. MFSL used it exclusively until JVC stopped offering it. Others that used it were Japanese home-market labels (often referred to as YSL), Barking Pumpkin (Zappa) and Nautilus. Some have ascribed its withdrawal from the market to declining volume, others to the truly expensive, nasty process necessary to make it. Either way, JVC has refused to sell the patent or license it to anyone else. A pity; it wears like iron and is the quietest formula I've ever heard.

Effischer described it very good. That JVC Vinyl was ultimate.
But that Knowledge is lost, today we can read everywhere, that we have super 200 gr Presslings and they are the best after slicend bred.
I would write that too when I would get them for free..... But I have to Pay and I think, they are generally bad...Noisy, damaged Grooves....