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pierre506
19-Sep-2020, 05:30
Brand: F64
Made by The 9th Studio in China
207893
207892
8x10in
10x10in
11x14in
12x20in
16x20in
20x24in

Tin Can
19-Sep-2020, 07:15
Very interesting!

I hope we continue to have International contact, exchange of goods and more

Drew Wiley
19-Sep-2020, 20:18
Good to see these being made. Large film sizes need that kind of flatness.

Kiwi7475
19-Sep-2020, 21:04
Brand: F64
Made by The 9th Studio in China
207893
207892
8x10in
10x10in
11x14in
12x20in
16x20in
20x24in

Where does one get them?
How much does a 8x10 holder weight?

pierre506
20-Sep-2020, 08:33
Let me weight it tomorrow. It's mid night in China now.

philfrem14
29-Sep-2020, 11:20
Interesting to see them also in europe ...
possibility of having them also in 7X17?

pierre506
8-Nov-2020, 23:07
Where does one get them?
How much does a 8x10 holder weight?

675g

Fr. Mark
6-Dec-2020, 11:38
I feel silly asking if someone had tried this and you are making these already! What do they cost and what kind of vacuum do they require to work?

Tin Can
6-Dec-2020, 11:46
I would think a small rechargeable Vacuum pump would be work on holders up to 20X24

Of course a bleed valve and experimentation would be needed

https://www.amazon.com/FLEXTAILGEAR-Portable-Rechargeable-Lightest-Mattress/dp/B07C2QR1TX/ref=sr_1_5?dchild=1&gclid=CjwKCAiAn7L-BRBbEiwAl9UtkGLI49yaUpXtoJNe61GBbzoF1JpjRZaMlrqfdrdadcm1n0Dv_6BxkxoCV8kQAvD_BwE&hvadid=409959228235&hvdev=c&hvlocphy=9022737&hvnetw=g&hvqmt=e&hvrand=16549970764175053647&hvtargid=kwd-301955099170&hydadcr=24656_11410729&keywords=battery+vacuum+pump&qid=1607280120&sr=8-5&tag=googhydr-20

Fr. Mark
11-Dec-2020, 13:41
I doubt that film holders will hold a vacuum well enough to need a bleed valve.

Drew Wiley
15-Dec-2020, 19:24
I can't speak for the specific style of filmholders under discussion. But otherwise, it's not difficult at all to convert regular filmholders to vacuum applications that hold the film just fine. If it's a metal or plastic holder, you turn it into a single-sheet holder, with the backside converted into the vac chamber. Little struts back there are employed to keep the septum from flexing during vac draw. A well thought-out pattern of tiny hole through the septum holds the film; and the back darkslide is cemented or silcone-caulked permanently in place to make the back chamber airtight.

Unless you are simply using a little cordless vac or rubber bulb system, I recommend some kind of bleeder option. The vac pump itself should NOT be piston-style or peristaltic like a diaphragm pump, but be rotary; otherwise pulses in the vac draw can actually jiggle your film plane.