Theme : identifY chemical products/ graphic arts, photo-lithography,alternative techniques.

Hello,

I participated to a workshop on photo-lithography and I would like to
identify some of the products we used in order to buy them and go ahead.
Could it be possible for you to give me some information or help or
addresses to find the accurate information?
With many thanks,
Albane
------------
Theme : identification of chemical products for graphic arts,
photography, lithography, and alternative techniques.

Description of the quiz I have to solve:

Papers have already been impressed (they contain the latent image and
are steel white). We work with a very few daylight. The room must be
dark but not completely. There is no artificial lighting.

1. Papers are imbibed with a mix of two products:
One is brown liquid with a medium smell, I think often used in photography.
The second one is transparent like water but is very odorous (when you
smell it, it is very aggressive). That looks like ammoniac very
concentrated.
When imbibed with this mix, in the darkroom, the prints become black
(like dirty).
According to you, what are these two products?

2. In order to clean this black veil, a green-grey coloured powder is
then used. The dry prints are put into this powder and have to stay some
hours, still in dark. When withdrawn, this powder has changed colour and
is now brown clear (as if it had absorbed the first brown product used).
Apparently, this powder is an instable product.
This powder is then introduced into water and mixed: water becomes light
blue and makes a soapy water with moss. Prints are now introduced in
this bath and have to stay some 2 or 3 minutes, agitated moderately.
When withdrawn, prints have now a visible image, covered with a
blue-grey veil.
According to your experience, what could be this product?

3. We end using a transparent liquid (sometimes it is crystals like
clear brown sugar which is melted to water and becomes transparent
liquid) put on the prints. Immediately, prints become clear pictures
with all details and colours. Then, we dry. Pictures are ready.
According to your experience, what could be this last product?

I have to identify and find the chemical name of these four products and
I would be grateful to you if you could help me.

Thanking you for your attention and help,
With best regards.

Albane

Please, could someone help in this ?
Thanks.
----------------------------

Albane a écrit :

Hello,

I participated to a workshop on photo-lithography and I would like to
identify some of the products we used in order to buy them and go ahead.
Could it be possible for you to give me some information or help or
addresses to find the accurate information?
With many thanks,
Albane
------------
Theme : identification of chemical products for graphic arts,
photography, lithography, and alternative techniques.

Description of the quiz I have to solve:

Papers have already been impressed (they contain the latent image and
are steel white). We work with a very few daylight. The room must be
dark but not completely. There is no artificial lighting.

1. Papers are imbibed with a mix of two products:
One is brown liquid with a medium smell, I think often used in photography.
The second one is transparent like water but is very odorous (when you
smell it, it is very aggressive). That looks like ammoniac very
concentrated.
When imbibed with this mix, in the darkroom, the prints become black
(like dirty).
According to you, what are these two products?

2. In order to clean this black veil, a green-grey coloured powder is
then used. The dry prints are put into this powder and have to stay some
hours, still in dark. When withdrawn, this powder has changed colour and
is now brown clear (as if it had absorbed the first brown product used).
Apparently, this powder is an instable product.
This powder is then introduced into water and mixed: water becomes light
blue and makes a soapy water with moss. Prints are now introduced in
this bath and have to stay some 2 or 3 minutes, agitated moderately.
When withdrawn, prints have now a visible image, covered with a
blue-grey veil.
According to your experience, what could be this product?

3. We end using a transparent liquid (sometimes it is crystals like
clear brown sugar which is melted to water and becomes transparent
liquid) put on the prints. Immediately, prints become clear pictures
with all details and colours. Then, we dry. Pictures are ready.
According to your experience, what could be this last product?

I have to identify and find the chemical name of these four products and
I would be grateful to you if you could help me.

Thanking you for your attention and help,
With best regards.

Albane

Albane wrote:

Please, could someone help in this ?
Thanks.

I'm sure it's partly an issue with language -- your English is a lot=20
better than my French, but what you write below still isn't what I'd=20
call fluent. In any case, the brown liquid and green-gray powder you=20
write about are completely unknown to me -- are you talking about lith=20
printing with photographic materials, or photolithography as the term is =

used in printing books and magazines? The press industry (books,=20
magazines, etc.) uses a lot of chemicals that are completely unsuitable=20
for even alternate processes in photography (like lith printing) because =

they're formulated to work with lithographic films, which are also=20
generally unsuited to pictorial images (though there are techniques for=20
rendering either half tones or continuous tones with litho films).

If you're trying to get the runaway development and time controlled=20
contrast characteristic of certain papers in "lith" developers with=20
photographic images, you need to start with the right papers and then=20
use the right developers, but none of it resembles what you describe=20
below, as far as I'm aware.

----------------------------
=20
Albane a =E9crit :
=20
Hello,

I participated to a workshop on photo-lithography and I would like to
identify some of the products we used in order to buy them and go ahea=
d.
Could it be possible for you to give me some information or help or
addresses to find the accurate information?
With many thanks,
Albane
------------
Theme : identification of chemical products for graphic arts,=20
photography, lithography, and alternative techniques.

Description of the quiz I have to solve:

Papers have already been impressed (they contain the latent image and =

are steel white). We work with a very few daylight. The room must be=20
dark but not completely. There is no artificial lighting.

1. Papers are imbibed with a mix of two products:
One is brown liquid with a medium smell, I think often used in=20
photography.
The second one is transparent like water but is very odorous (when you=

smell it, it is very aggressive). That looks like ammoniac very
concentrated.
When imbibed with this mix, in the darkroom, the prints become black=20
(like dirty).
According to you, what are these two products?

2. In order to clean this black veil, a green-grey coloured powder is
then used. The dry prints are put into this powder and have to stay so=
me
hours, still in dark. When withdrawn, this powder has changed colour a=
nd
is now brown clear (as if it had absorbed the first brown product used=
).
Apparently, this powder is an instable product.
This powder is then introduced into water and mixed: water becomes lig=
ht
blue and makes a soapy water with moss. Prints are now introduced in=20
this bath and have to stay some 2 or 3 minutes, agitated moderately.=20
When withdrawn, prints have now a visible image, covered with a=20
blue-grey veil.
According to your experience, what could be this product?

3. We end using a transparent liquid (sometimes it is crystals like=20
clear brown sugar which is melted to water and becomes transparent=20
liquid) put on the prints. Immediately, prints become clear pictures=20
with all details and colours. Then, we dry. Pictures are ready.
According to your experience, what could be this last product?

I have to identify and find the chemical name of these four products=20
and I would be grateful to you if you could help me.

Thanking you for your attention and help,
With best regards.

Albane


--=20
I may be a scwewy wabbit, but I'm not going to Alcatwaz!
-- E. J. Fudd, 1954

Donald Qualls, aka The Silent Observer
Lathe Building Pages http://silent1.home.netcom.com/HomebuiltLathe.htm
Speedway 7x12 Lathe Pages http://silent1.home.netcom.com/my7x12.htm

Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.

How about reading a book on graphic arts technology? Or even the relevant
Kodak catalogue?