Ich nehme an das Glas ist 2 mm stark? Ich habe nämlich das Problem, dass die kaputte Mattscheibe meiner Ica Juwel (13x18) in einem Rahmen mit umlaufender Nut sitzt. Dadurch bin ich auf ein Höchstmaß von 1,5 mm Stärke angewiesen. Nur leider bekommt man fast nirgendwo Glas in solchen Stärken.

I have always suspected that there was a DIY Ground Glass technique, thank you for post it this.

Hello. Thank you for your recipe for making frosted glass for a 13 * 18 camera. I made a focusing screen for my camera using a 400 + 600 image, the result is excellent

The other two techniques you can use that are faster are
- sandblasting (with fine alumina/Edelkorund grit) and
- fluoride etching (chemically very dangerous - HF and bifluorides are highly toxic -, but produces the finest surface finish. Hobby glass etching pastes exist on eBay in 100 and 200g cans, but their safety equipment is often inadequate and laughable; you are handling a paste containing some 30-70% HF in weight bound in bifluorides there).
So basically the techniques used in larger scale sanitary ground glass production by glass shops.

When you want to save the time and danger, just buying a sheet of factory satinized (by etching) float glass stock from a supplier is possible too.

Awesome Dear Markus Hofstätter

Really appreciate the DIY

Great job.

Simple and helpful, thanks!

brilliant many thanks

Brilliant

This is so cool 😎 Thanks!

Congratulations!!!

I had to do this for my homebuilt 5x7 pinhole camera

v interesting 👍🏼

awesome. thanks

THANK YOU! Just got a Kodak N0. 2 5x7 (a family heirloom) with missing ground glass, and it turns out I have everything I need to do this! the camera needs some love and a better lens but I'm going to get it in shooting condition and probably do some paper negative stuff and maybe some wet plate in the future. brobably need to make some more film backs as well.

Thanks

Pretty good.
A glass from a discarded flatbed scanner would be good for making a ground glass.

Note to self: 400 Grit Silicon Carbide then 600

(I know i'll be referencing this every time I need a new screen)

Nice. Something to consider here. If the glass is ground with finer grit beyond a point,  it would be difficult to focus.  I think the 600 grit used here is good enough. No finer than this.

Hint - Do This in the bathtub--put a washrag under the glass for support. All the mess washes right down the drain  ...