Where Can I Buy These Cards?

What are these cards called (U311 cut square included as a prop)?
Also, where can I buy them? I found the 8 1/2 x 11 version, but not this little guy.

I checked my go-to source for supplies (ihobb.com) and found this -

https://www.ihobb.com/p/MANILA_CARDS100.html

5-3/4" x 3-1/4"

I make mine with masking tape and scrap paper.

Got 'em.

Thanks for the help, guys.

I have probably 100 of them in case you are interested in buying used ones. Just e-mail me if you want to go that route. Peter

I asked some years ago for the very same things,
(on another Aust stamp forum)
I got torn to shreds, suggesting these things destroy stamps.

Reasons? Was it because the paper can turn brown and discolor the stamps? It's true I have had some manila cards that look like they were made in the 1950s and have turned brown and I wouldn't use today, but I have no problem with the fresh modern ones made for philatelic use. Just don't put anything valuable on the cards and then lock them up in a cardboard shoebox for 50 years or they might turn brown too.

And inserting stamps into the stock cards or stock pages is a two-handed process. Use tongs or a fingernail to lift and hold the paper strip before sliding in the stamp, otherwise perfs could get snagged on the strip if the pages are stiff. Still a lot safer than trying to use a "coffin mount", let me tell you.

No not that, I think the Sheriff's point was this,




It was the delivery of the advice that got me, I left for greener pastures.

I have tested the older Elbe-type approval cards with a Ph pen - they are no good in the archival sense.

I suspect that the newer ones would have the same result, based upon the materials used, though I have not personally tested the ones from the last couple of years.

Perhaps someone who has the newer cardboard cards can test with a Ph pen and post the results here.

John

I have not understood well, do you use untreated cardboard tokens to store for years?
I call them "swap card", the stamps stay there for 10-15 days.
For long periods, before assembly, I use classifiers or cards treated like this with straps and lid made of acid-free plastics and to insert the stamps I use a sheet of acetate the size of a stamp. I take this one with the stamp behind it a little higher, open the strip with the foil and slide the stamp down with my finger, so they go in undamaged.
I also use the acetate to remove them, I never got used to tweezers and I don't have stamps that I can't touch with clean and dry hands.
I have spread this system everywhere and friends from Madrid have told me that more and more collectors are using it.

Me too.
I often get them as holders for stamps in "swaps" , collectors cut them to fit the cover they are sending them in.