Ortho Films

Just out of curiosity can Ortho films like this be used like Kodalith

http://www.jandcphoto.com/index.asp?...ROD&ProdID=456

I want to produce text masks for photo cards and am wondering if I can
do so with it.
--
The sometimes insomniac.

www.gregblankphoto.com

"Greg "_"" wrote in message
...
Just out of curiosity can Ortho films like this be used
like Kodalith

http://www.jandcphoto.com/index.asp?...ROD&ProdID=456

I want to produce text masks for photo cards and am
wondering if I can
do so with it.
--
The sometimes insomniac.

www.gregblankphoto.com

I think you must write to J&C to find out exactly what
this is. They start by saying it is an orthochromatic
version of PL-25, which is supposed to be similar to Agfa
APX-25, Panatomic-X, and similar films but then state it is
suitable for document copying and has extremely high
resolution. These two statements are in conflict. Films like
APX-25 and the old Adox films, are very fine grain, single
coated, standard contrast panchromatic films intended for
pictorial photography with normal developers. Lithographic
films are extremely high contrast in any developer and are
usually developed in solutions that make full use of this
effect. They are mainly used for copying line material.
There is a class of very high contrast, but still continuous
tone, materials used for various copying chores. These can
sometimes be used for pictoroal purposes with special very
low contrast developers. The description of this film makes
me think it is of this type. Both lith and high contrast
"commercial" films were made in all three color
sensitization classes although most of the high contrast
stuff was either non-color sensitized (senstive only to blue
light) or orthochromatic.
At one time orthochromatic films were offered in all
types: they were popular for press work and for portraits of
men where the lack of red sensitivity brought out skin
textures.
I could not fine any curves or other data on the J&C web
site but they may have them and can tell you what exactly
this is.


--
---
Richard Knoppow
Los Angeles, CA, USA

In article . net,
"Richard Knoppow" wrote:

"Greg "_"" wrote in message
...
Just out of curiosity can Ortho films like this be used
like Kodalith

http://www.jandcphoto.com/index.asp?...ROD&ProdID=456

I want to produce text masks for photo cards and am
wondering if I can
do so with it.
--
The sometimes insomniac.

www.gregblankphoto.com

I think you must write to J&C to find out exactly what
this is. They start by saying it is an orthochromatic
version of PL-25, which is supposed to be similar to Agfa
APX-25, Panatomic-X, and similar films but then state it is
suitable for document copying and has extremely high
resolution. These two statements are in conflict. Films like
APX-25 and the old Adox films, are very fine grain, single
coated, standard contrast panchromatic films intended for
pictorial photography with normal developers. Lithographic
films are extremely high contrast in any developer and are
usually developed in solutions that make full use of this
effect. They are mainly used for copying line material.
There is a class of very high contrast, but still continuous
tone, materials used for various copying chores. These can
sometimes be used for pictoroal purposes with special very
low contrast developers. The description of this film makes
me think it is of this type. Both lith and high contrast
"commercial" films were made in all three color
sensitization classes although most of the high contrast
stuff was either non-color sensitized (senstive only to blue
light) or orthochromatic.
At one time orthochromatic films were offered in all
types: they were popular for press work and for portraits of
men where the lack of red sensitivity brought out skin
textures.
I could not fine any curves or other data on the J&C web
site but they may have them and can tell you what exactly
this is.

Thanks Richard!
--
The sometimes insomniac.

www.gregblankphoto.com

I suspect that the film is closer to the old Agfa Ortho 25 than APX 25.

"Richard Knoppow" wrote in message
ink.net...

"Greg "_"" wrote in message
...
Just out of curiosity can Ortho films like this be used like Kodalith

http://www.jandcphoto.com/index.asp?...ROD&ProdID=456

I want to produce text masks for photo cards and am wondering if I can
do so with it.
--
The sometimes insomniac.

www.gregblankphoto.com

I think you must write to J&C to find out exactly what this is. They
start by saying it is an orthochromatic version of PL-25, which is
supposed to be similar to Agfa APX-25, Panatomic-X, and similar films but
then state it is suitable for document copying and has extremely high
resolution. These two statements are in conflict. Films like APX-25 and
the old Adox films, are very fine grain, single coated, standard contrast
panchromatic films intended for pictorial photography with normal
developers. Lithographic films are extremely high contrast in any
developer and are usually developed in solutions that make full use of
this effect. They are mainly used for copying line material. There is a
class of very high contrast, but still continuous tone, materials used for
various copying chores. These can sometimes be used for pictoroal purposes
with special very low contrast developers. The description of this film
makes me think it is of this type. Both lith and high contrast
"commercial" films were made in all three color sensitization classes
although most of the high contrast stuff was either non-color sensitized
(senstive only to blue light) or orthochromatic.
At one time orthochromatic films were offered in all types: they were
popular for press work and for portraits of men where the lack of red
sensitivity brought out skin textures.
I could not fine any curves or other data on the J&C web site but they
may have them and can tell you what exactly this is.


--
---
Richard Knoppow
Los Angeles, CA, USA

The product you mentioned would be more like the Kodak Commercial Film,
Freestyle markets a graphics art ortho litho film
http://www.freestylephoto.biz/sc_main.php?cat_id=2001 that would be more
like Kodalith. They also market the AB lith developers.

--
darkroommike

"Greg "_"" wrote in message
...
Just out of curiosity can Ortho films like this be used like Kodalith

http://www.jandcphoto.com/index.asp?...ROD&ProdID=456

I want to produce text masks for photo cards and am wondering if I can
do so with it.
--
The sometimes insomniac.

www.gregblankphoto.com

In article ,
"Mike King" wrote:

The product you mentioned would be more like the Kodak Commercial Film,
Freestyle markets a graphics art ortho litho film
http://www.freestylephoto.biz/sc_main.php?cat_id=2001 that would be more
like Kodalith. They also market the AB lith developers.

Thanks Mike!
--
The sometimes insomniac.

www.gregblankphoto.com