Perfect - thank you! And forgive me if this is a stupid question, but I’ve got a couple of larger prints (1000mm) but the rest are smaller. I take it that there’s no downside to putting smaller prints in large sleeves?

That’s really helpful, thanks again

One thing I'll say about Baroque's sleeves is that they lack rigidity, so you have to be more careful if ever you're moving or transporting them. Of course you could get a more rigid insert separately but the sleeves that Acme suggested seem to alleviate the need.

I looked into this in the past and below is a link to the best large poster boxes I could find, but there was a minimum order of 3 boxes so I did not bother. Luckily I have a safe space to keep them flat at the moment.

www.preservationequipment.com/Catalogue/Archival-Storage/Movie-Poster-Archival-Storage/Archival-movie-poster-boxes/Movie-Poster-Archival-Storage-Boxes

Are those deep enough?

I had an image of something like an art folder to keep them all in. This sort of thing-


www.staples.co.uk/office-supplies/arts-and-crafts-products/craft-supplies/goldline-zip-portfolio-lightweight-polypropylene-a1-black-zpc-a1/?gad_source=1&gclid=CjwKCAiA_tuuBhAUEiwAvxkgTi7sRn5yTmN_IaDMe8Do25JL-Vh3wBEOzOocPslBoOOJGNacjXTXHxoCpHYQAvD_BwE

But if we need 3 people to order 3 of those boxes, there's you and me and the person who started the thread, surely?! 

This is really helpful, thank you. Off to the timber merchants I go!

I bought the preservationequipment movie poster boxes. They are very good and can easily hold 30+ prints.
I have one left in case anyone needs one (London area)… too big to ship.

They also have smaller A4/A3/A2 boxes that I use for smaller stuff.
The rest is in normal A1 art portfolio.

I‘d be careful using MDF to store prints / wouldn‘t advise it.
MDF leaches formaldehyde and resin compounds, which would damage prints long term. 😱

It would- in the long run.
Paper/card is diffusion open, so anything would leach through it. Prints have been spoiled before because of a crappy wooden frame backing board (despite archival paper behind the print).
Also- paper expands and contracts, so sandwiching paper under something heavy for longer might not be ideal.
I wouldn‘t get the prints out of your sandwich asap, but would look for better storage options in the future/mid-term if you‘re serious with the art you are storing there.
That MDF idea seems seriously silly.
MDF is full of glue, resin, formaldehyde, wood dust… that is why i.e. you won‘t find any MDF backing on any picture frame.
That is just my 10 cents of advice, but I‘m sure others might disagree.

eyectopus That’s not a bad solution, but also gets quite expensive, especially in A0.

I forgot to mention that MDF is also acidic.

It’s difficult, but I admit that I’m also super anal.
For my big prints I went with selwyn sleeves, acid buffered sheets in between the selwyn sleeves, and all that in the preservation equipment ltd acid buffered movie poster box.

It took me a few years before I did that because I was too tight.
Why not do it though if you are buying art? Otherwise download jpegs from the web, print them at the copy shop and not worry about it.