Forte Polywarmtone Paper Speeds

rshepard · Jan 15, 2008

I was just given a couple of opened 25-sheet packs of Forte Polywarmtone FB paper (one is Elegance PWT Art with an ivory finish, the other PWT with a glossy finish). To maximize their use in printing negatives I need to know the ISO speed of these papers. If you know what those speeds are, or have a reference to where I can find them, please let me know.

If such data are not available, I'll need to determine the speeds myself; probably with cut sheets to conserve paper.

TIA,

Rich

ath · Jan 15, 2008

You can take the values from the ADOX Polywarmtone, it is the same paper.
However, I'm under the impression, that these values are not very correct. Polywamtone is roughly 4 times (2 stops) slower compared to Ilford MG IV or Agfa MCP.

naaldvoerder · Jan 15, 2008

Is this helpfull?

ILFORD filters
Parameters without 00 0 1 2 3 4 5
R 100 150 130 110 90 80 70 60
P 160 50 50 50 50 40 25 25

KODAK filters
Parameters without -1 0 1 2 3 4 5
R 100 140 120 110 100 90 70 60
P 160 100 100 100 100 80 25 25

DURST color enlarger head
Parameters without 150Y 100Y 30Y 20M 50M 100M 150M
R 100 150 130 100 90 80 70 70
P 160 50 64 100 100 80 64 50

Saved from Forte's website

Jaap jan

rshepard · Jan 15, 2008

Thank you Andreas and Jan.

When I searched the Web with Google for the paper speed the Forte website did not show up. Since I have a color head on my Beseler enlarger, I can convert the Durst values.

Much appreciated,

Rich

bdial · Jan 15, 2008

If the packages are sealed, there should be a datasheet. If not, I could send you a scan if you want. Let me know.

Bruce Osgood · Jan 15, 2008

rshepard said:
SNIP.... Forte Polywarmtone FB paper (one is Elegance PWT Art with an ivory finish, the other PWT with a glossy finish). end snip
TIA,

Rich

I have the poop sheet from a box of Polygrade V Elegance Fiber Based Paper that says the papers ISO speed is 400 without filtration.

ann · Jan 15, 2008

the polywarmtone is 160 if i remember correctly. the paper Bruce is talking about is not the same paper.

rshepard · Jan 18, 2008

bdial said:
If the packages are sealed, there should be a datasheet. If not, I could send you a scan if you want. Let me know.

Thank you. That would be handy to have. I'll give you my email address in a private message so it's not too available for spammers.

Rich

rshepard · Jan 18, 2008

ann said:
the polywarmtone is 160 if i remember correctly. the paper Bruce is talking about is not the same paper.

Ann,

That's in line with the first two replies. Thank you very much.

Rich

Ray Heath · Jan 18, 2008

g'day Rich

how is it useful to know the ISO of printing paper?

Ray

bdial · Jan 18, 2008

It's useful when you're switching from other papers and looking get an equivalent exposure. For me, all of my contacts are on Ilford, but I may or may not choose Ilford for a printing session.
Here is the data sheet. If you have problems reading it, pm me with an email, and I can send a better version.

Forte Polywarmtone Paper Speeds

rshepard

ath

naaldvoerder

rshepard

bdial

Bruce Osgood

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ann

rshepard

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Ray Heath

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