Your Etsy store shows 30 orders, but I cannot find my first order to review. My new order is closed to review until 1/31/2018.
Perhaps you rearranged the store and lost some reviews.
What size plate is 2.25 X 3.25 I have a few kinds of those also. One type at hand right now is Mamiya x 3 DDS made in Linhof style with removable film sheaths. They can be used on Mamiya RB and as normal DDS on 2x3 cameras.
Pretty rare are Hasselblad 2.5X2.5" film holders which may be best used with a 1mm thick glass. If you include a 2.5x2.5 of your normal glass I will check fit..
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
I'm am not a wiz at Etsy by any means, so anything is possible. Thanks for looking, though.
Here is the chart that I reference for plate sizes.
http://camerapedia.wikia.com/wiki/Plate_Sizes
2 1/4 x 3 1/4 is 120 film size (~6x9). That is close to "sixth plate" size of 2.5" x 3.5".
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
Just to confirm that the standard lantern glass slides (I have both Ilford and Gevaert in front of me from the 1960's) is 3 1/4 x 3 1/4" or 82x82mm. But other sizes may exist.
Taking about lantern glass, I have exposed one to-day from a packet that must be either from the 50's or 60's. This was to check my darkroom operations with glass plates and trying out hardener in the water stop bath. I assume that these old plates were of similar "Speed" to the new production. I used 3 secs at F.20 and got a very satisfactory exposure which emerged after about 2 minutes.
Perhaps glass plates have longer life that film based emulsion?
I can confirm my belief that these plates have no notches (Or similar) to indicate emulsion side and the edges are raw cut finish. The lighest of touches tells you which side has the emulsion!
I am certain I read there were various sizes for Lantern Slides. I researched the projectors on eBay. I posted a found one exactly one year ago today. Then a member here identified the location of the image! This one is from memory perhaps 3X3".
1-Magic Lantern slide Elizabeth St NYC by moe.randy, on Flickr
On the oddball sizes, all you have to do is measure the dimensions of your holder and I can cut them to whatever size is needed to fit in them. It's the popular sizes that I just wanna make sure fits in every holder out there.
Newly made large format dry plates available! Look:
https://www.pictoriographica.com
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