What OHP and Alt Process do you use?

jag2x · Jan 30, 2009

Hi all,

Can you give me a list of what sort of OHP substrate you use and what process you use it for?
I currently use Ulano Transparency for Gum. Will be testing it out for silver gelatin soon.
Cheers
J

PVia · Jan 30, 2009

I've been using Freestyle's Arista OHP (in my Epson 3800) for palladium and silver printing. In fact, just tried silver printing with it this week and it worked perfectly. I'm testing a new brand soon and will report back if it works well...

jimcollum · Jan 30, 2009

jag2x said:
Hi all,

Can you give me a list of what sort of OHP substrate you use and what process you use it for?
I currently use Ulano Transparency for Gum. Will be testing it out for silver gelatin soon.
Cheers
J

still using the old original.. pictorico

Pt/Pd (Ziatype)

Ben Altman · Jan 30, 2009

Ditto: Pictorico OHP and Ziatype. Just getting rolling again after moving. Will be experimenting with develop-out Pt/Pd, Azo and other neg. materials (recommendations welcome) in due course.

Ben

Joe Lipka · Jan 30, 2009

I used premium OHP and Pt/Pd.

I have two unopened 15 sheet envelopes and a partial envelope.

Send me a PM if you are interested.

tom_micklin · Jan 30, 2009

For years I used Pictorico for Bromoil and Kallitype.
I'm now using Canon Transparent Clear Film for the Kallitypes.
I made the switch to try it out because of the price being so much lower than Pictorico.
Works very nicely with the Canon Pixma 9500 printer.

nze · Feb 1, 2009

I use Tecco, agfa or pictorico. But As I got some roll of Tecco I fix on it . As changing of OHP result in changing the curve and exposure. Some change can be dramatic.
I have to test all the sample of OHP I 've got under my hand but it looks like that Pictorico absorbs more ink than the other and can give higher Density with a specific ink tone.

By the way all ohp I use give good result if well used.
I work platinum, argyrotype, cyanotype, gum mono an tricolor

sanking · Feb 2, 2009

In the past I have printed with Pictorico OHP and carbon, kallitype and pt./pd.
I have also used an OHO from PhotoWarehouse but adhesion of the pigment inks is not as good as with Pictorico.

I would love to find a substitute for Pictorico as the very high UV transmission density increases exposure times a lot, but so far I have not found another OHP surface that takes and holds the inks as well.

If anyone has a good alternative to Pictorico that has less UV blocking and holds the inks equally well my ears and eyes are open.

Sandy King

PVia · Feb 2, 2009

Sandy,

You should try the Freestyle OHP. I'm getting 7 - 7 1/2 minute sun exposure times using Ron's Pd profile for QTR with it.

I'm also testing a new OHP that is much less expensive, in the neighborhood of $58 for 100 8.5 x 11 sheets.

sanking · Feb 2, 2009

I have use the material from PhotoWarehouse. It is very clear base, which I like, but the pigment inks don't hold to the base all that well.

How about the Freeystyle material in terms of adhestion?

Sandy King

PVia said:
Sandy,

You should try the Freestyle OHP. I'm getting 7 - 7 1/2 minute sun exposure times using Ron's Pd profile for QTR with it.

I'm also testing a new OHP that is much less expensive, in the neighborhood of $58 for 100 8.5 x 11 sheets.

PVia · Feb 2, 2009

Sandy...all seems well over here. What adhesion problems are you having? Flaking after a while...or other...?

sanking · Feb 2, 2009

The pigment inks from Epson 2200, 2400, 3800, etc. do not dry well on the Photo Warehouse OHP. if you expose with a vacuum frame some of the image will be sucked from the OHP and deposited on the surface of the material being exposed. Not a good thing.

Sandy King

PVia said:
Sandy...all seems well over here. What adhesion problems are you having? Flaking after a while...or other...?

PVia · Feb 3, 2009

I don't use a v-frame so I'm not sure what the effect will be, but the negs seem to be pretty robust once they dry overnight...I've even printed with them in a regular frame within an hour of printing with no problems.

Colin Graham · Feb 3, 2009

I wonder if the Arista stuff from Freestyle is the same as the InkPress OHP, which is also 7mil and carries a Burkholder endorsement as well. I've been meaning to try each of them. The 13" roll is also exactly 32.8' long on both.

pschwart · Feb 3, 2009

sanking said:
In the past I have printed with Pictorico OHP and carbon, kallitype and pt./pd.
I have also used an OHO from PhotoWarehouse but adhesion of the pigment inks is not as good as with Pictorico.

I would love to find a substitute for Pictorico as the very high UV transmission density increases exposure times a lot, but so far I have not found another OHP surface that takes and holds the inks as well.

If anyone has a good alternative to Pictorico that has less UV blocking and holds the inks equally well my ears and eyes are open.

Sandy King

Arista OHP (Freestyle) and Inkpress OHP are drop-in replacements for Pictorico, they even have the same milky appearance. Cheaper, too, so I haven't used Pictorico in a while. The 8-1/2x11 Inkpress is available in
50 sheet boxes, too, so also better packaging. These OHPs are bullet-proof with the Epson R800/1800 Ultrachrome inks -- you can run the negs under water with zero bleed.

sanking · Feb 3, 2009

So do the Arista OHP and Inkpress OHP also have the same high UV blocking as Pictorico?

Sandy King

pschwart said:
Arista OHP (Freestyle) and Inkpress OHP are drop-in replacements for Pictorico, they even have the same milky appearance. Cheaper, too, so I haven't used Pictorico in a while. The 8-1/2x11 Inkpress is available in
50 sheet boxes, too, so also better packaging. These OHPs are bullet-proof with the Epson R800/1800 Ultrachrome inks -- you can run the negs under water with zero bleed.

donbga · Feb 3, 2009

sanking said:
So do the Arista OHP and Inkpress OHP also have the same high UV blocking as Pictorico?

Sandy King

It's been a while since I've measured the two but as I recall they are pretty close to OHP for UV density.

Don Bryant

PVia · Feb 3, 2009

The OHP from American Screen Supply that I was testing (see above) seems to have some dropout spots in each neg I print...pure white, usually in the sky ;-) The OHP seems to be about 4 mil in thickness.

However, I printed 4 negs with the Arista-Freestyle OHP and they were perfect and printed beautifully.

Ben Altman · Feb 6, 2009

So does anyone have a good, low UV-blocking, replacement for Pictorico that works in a vacuum frame? And can be used large? And preferably cheaper...

PVia · Feb 6, 2009

Ben, see above...try the Arista. Buy a small pack of 8.5x11 for testing...a pretty-much direct Pictorico replacement.

Ben Altman · Feb 6, 2009

Thanks, but from what I saw above the Arista blocks as much UV as the Pictorico.
So while cheaper is certainly helpful, what I was hoping to hear about was something that is more transparent to UV, AND works well with K3 inks.

PVia · Feb 6, 2009

Ben, I'm using the Arista with the 3800 and K3 inks...take a look in the Gallery section for my two palladium prints made with it. Both are 7 minute sun exposures...

What processes are you looking to use it for?

pschwart · Feb 6, 2009

Ben Altman said:
Thanks, but from what I saw above the Arista blocks as much UV as the Pictorico.
So while cheaper is certainly helpful, what I was hoping to hear about was something that is more transparent to UV, AND works well with K3 inks.

That's the tradeoff The Photowarehouse stuff and Canon Transparent Clear Film are faster by at least 1/2 stop. They have thinner bases so are incredibly sharp, but inks do not adhere well. I could live with this, but the inks dry slowly on them so I get pizza wheel tracks.
You can literally run Arista/Inkpress/Pictorico under running water and Ultrachrome won't bleed.

sanking · Feb 6, 2009

I have used the PhotoWarehouse OHP with the Epson 2200 for several years. I lifted the pizza wheels permanently so I don't have a problem with that. I have a 3800 and would like to switch to it soon but so far am not sure that I will be able to use the large supply of PhotoWarehouse OHP that I still have. I think it might be possible because the 3800 has a front loader that bypasses the pizza wheels.

However, to use the PW OHP in a vacuum frame you must sandwich the emulsion side to another piece of clear plastic. That is doubly true with carbon printing. But one would need to also sandwich Pictorico with carbon printing.

Sandy King

pschwart said:
That's the tradeoff The Photowarehouse stuff and Canon Transparent Clear Film are faster by at least 1/2 stop. They have thinner bases so are incredibly sharp, but inks do not adhere well. I could live with this, but the inks dry slowly on them so I get pizza wheel tracks.
You can literally run Arista/Inkpress/Pictorico under running water and Ultrachrome won't bleed.

pschwart · Feb 6, 2009

sanking said:
I have used the PhotoWarehouse OHP with the Epson 2200 for several years. I lifted the pizza wheels permanently so I don't have a problem with that. I have a 3800 and would like to switch to it soon but so far am not sure that I will be able to use the large supply of PhotoWarehouse OHP that I still have. I think it might be possible because the 3800 has a front loader that bypasses the pizza wheels.

However, to use the PW OHP in a vacuum frame you must sandwich the emulsion side to another piece of clear plastic. That is doubly true with carbon printing. But one would need to also sandwich Pictorico with carbon printing.

Sandy King

I bought a whole roll of the Canon TCF so I wish I could use it. Removing the pizza wheels from my R800/1800 was not a trivial exercise, and cutting up rolls is a PITA, so I reverted to Arista/Inkpress. Maybe I'll try this again when I get some free time.

What OHP and Alt Process do you use?

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