Quote Originally Posted by AgX View Post
You got me... Yes I remember now, there were clear sleeves glued like those paper ones but made from very thin plastic foil. Yes, they could have been from acetate.

Seemingly it's me living at the end of the World...
AgX, I wasn't being deliberately clever. I thought the description of the 'acid free, chlorine free' could have applied to one, the other or both.

Personally, I like the glassine sleeves but the ability to adapt the clear sleeves has advantages.