Help with "onionskin" in albums

[Niblet]

Hello! I am into complete albums,,and have noticed that there is between each page another page of what I term onion skin?? my question is..has anyone ever seen the type where there seems to be a spiderweb design with a spider and then I have seen the generic one with swirls on them,,can anyone help me understand what these are and how many different designs ther might be?? thanks,, here is the spiderweb design:

[Niblet]

with spider

[Niblet]

generic swirls

[Niblet]

Pioneer album with the spiderweb design

[Gerdan]

Niblet

a lot of album manufactured in thoses years have these pages of thin paper with this special "design". It was made to protect the pictures between the pages. And even it was a temporary fashion.
I have seen a lot of them.

Gerdan

[Simon O.]

Same here, including this spiderweb design

[Justin P]

Checked the photo albums I have, and yes they have the spider web! But no spider in mine

[Niblet]

Thanks guys! apprciate it!

[stray_dog]

Traces...

Traces of these patterns can be spotted on the photos, too! I have a group of 24 photos of a RAD member, which were unfortunately taken off their album... The spider web pattern can be clearly seen on the photos though, under light. So, that kind of paper should not be that "neutral", as it's leaving it's mark on the photos... Maybe some other patterns could be traced "indirectly" in that way!