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.
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.