Mylar Sleeves for 4x5-Inch and 8x10-Inch Sheet Film

[islomane]

Decades ago I mail-ordered a quantity of matte finish Mylar sleeves for storing my black & white 4x5-inch and 8x10-inch sheet film negatives, placing these sleeves in archival envelopes. My supply of such Mylar sleeves (open on three sides) has been exhausted and I'd like to order more, but I've been unable to find a supplier. Can anyone recommend an online/mail-order source?

[Richard Wasserman]

Archival Methods— https://www.archivalmethods.com/

University Products— https://www.universityproducts.com/photo-products/negative-storage

[islomane]

Thanks for the links. I found Polypropylene and Polyester (mostly clear) sleeves at those websites, not the frosted Mylar sleeves for which I'm looking. Mylar, of the kind used for drafting with technical pens (the Rapidograph name comes to mind), is in my experience far superior to clear plastic sleeves for sheet film storage.

[Richard Wasserman]

I believe that Mylar is a brand name for polyester. I too much prefer polyester to polypropylene.

Yep, see this— https://www.grafixplastics.com/grafix-plastics/plastic-film-plastic-sheet-faq/mylar_what/mylar_types/

[Vaughn]

This is my usual source for such things, but no frosted mylar/polyester. They have both one side and two sides (L) sealed.

http://www.conservationresources.com/Main/section_12/section12_03.htm

[Richard Wasserman]

Sorry, I missed/ignored that you are looking for frosted sleeves. The polyester ones I see are all clear, only polypropylene are frosted.