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RA-4 filtration and exposure question. Basic

 
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zentena

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Since: Jun 03, 2004
Posts: 983



(Msg. 1) Posted: Sun Dec 14, 2003 2:46 pm
Post subject: RA-4 filtration and exposure question. Basic
Archived from groups: rec>photo>darkroom (more info?)

Since I've basically decided that the probe on my anaylser is
wonky I tried to do the process without it. Using the starting filtration
numbers for the paper I ended up with a print that is too red. Looking at
the help section of the Kodak document they suggest removing cyan [Which I
didn't use] or adding yellow and magenta. Fair enough. Using the viewing
filters adding a little yellow and magenta fixes the skin tones but the hair
is WAY too red. The question is. Isn't cyan neutral density in colour
printing? If I remove it then isn't that equal to increasing exposure? So
should I just increase exposure? The current exposure seems pretty good and
if I didn't know the hair should be black instead of red I'm not sure I'd
complain.

  Also does anybody make any thicker papers? Right now I'm using
Kodak Endura.

Thanks
Nick<!-- ~MESSAGE_AFTER~ -->

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user814

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Since: Nov 23, 2004
Posts: 370



(Msg. 2) Posted: Sun Dec 14, 2003 9:54 pm
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Nick Zentena" <zentena.TakeThisOut@hophead.dyndns.org> wrote in message
news:bogua1-jvq.ln1@barley.dyndns.org...
 >
 > Since I've basically decided that the probe on my anaylser is
 > wonky I tried to do the process without it. Using the starting filtration
 > numbers for the paper I ended up with a print that is too red. Looking at
 > the help section of the Kodak document they suggest removing cyan [Which I
 > didn't use] or adding yellow and magenta. Fair enough. Using the viewing
 > filters adding a little yellow and magenta fixes the skin tones but the
hair
 > is WAY too red. The question is. Isn't cyan neutral density in colour
 > printing? If I remove it then isn't that equal to increasing exposure? So
 > should I just increase exposure? The current exposure seems pretty good
and
 > if I didn't know the hair should be black instead of red I'm not sure I'd
 > complain.
 >
 > Also does anybody make any thicker papers? Right now I'm using
 > Kodak Endura.
 >
 > Thanks
 > Nick

Nick,

First, CYAN is not ND. If you have equal amount of all three colors
(YMC) then you have ND. If you had a filter pack of 70Y, 40M and 20C you
would also have the same filtration with a filter pack of 50Y, 20M, and 0C
with a shorter exposure time.

OK, that behind us, now here's a reality of color printing. Color
Crossover. Some films are not compatible with some papers. If you can get
skin tones correct, then you may not be able to get this person's hair
correct as well. Unless you really want to burn the hair (just like in
B&W).

Most color papers are standard RC weight. Ilford makes a really
expensive paper that's on a polyester base. Not sure if it's worth it...

I can't comment first hand, but I have heard of people having real color
problems with Endura. Are you using Ultra Endura by chance and Portra VC or
UC? If so, I can understand the redheaded, blackhaired print...<!-- ~MESSAGE_AFTER~ -->

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zentena

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Since: Jun 03, 2004
Posts: 983



(Msg. 3) Posted: Sun Dec 14, 2003 9:54 pm
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Jim Phelps <jim.phelps.TakeThisOut@mi.com> wrote:

 >
 > First, CYAN is not ND. If you have equal amount of all three colors
 > (YMC) then you have ND. If you had a filter pack of 70Y, 40M and 20C you
 > would also have the same filtration with a filter pack of 50Y, 20M, and 0C
 > with a shorter exposure time.

That fits some of the other info better.


 >
 > Most color papers are standard RC weight. Ilford makes a really
 > expensive paper that's on a polyester base. Not sure if it's worth it...

I'm used to Agfa RC B&W paper. The Kodak RC paper feels so thin.

 >
 > I can't comment first hand, but I have heard of people having real color
 > problems with Endura. Are you using Ultra Endura by chance and Portra VC or
 > UC? If so, I can understand the redheaded, blackhaired print...


Actually I grabbed the first negative I could find. Wasn't really
expecting to much. The film is likely 15+ year old Kodak film. I'll try
dialing in some more yellow and magenta. At worst I waste some paper-). I
just wanted to get a clear idea of the direction I should be heading.

Thanks
Nick<!-- ~MESSAGE_AFTER~ -->
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user814

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Since: Nov 23, 2004
Posts: 370



(Msg. 4) Posted: Mon Dec 15, 2003 11:50 am
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"> Actually I grabbed the first negative I could find. Wasn't really
 > expecting to much. The film is likely 15+ year old Kodak film. I'll try
 > dialing in some more yellow and magenta. At worst I waste some paper-). I
 > just wanted to get a clear idea of the direction I should be heading.
 >
 > Thanks
 > Nick

Nick,

I know what you mean. Using some old Kodak Vericolor II and III
negatives, I really have to play with filtration on today's papers (Supra
III). The OLD Ektacolor papers (37 and 74) worked much better with
Vericolor and almost no crossover problems. I assume that the papers of the
day were matched to the films of the day. Same holds true with modern
materials.

Be careful dialing in more filtration. You'll end up with a black haired
oxygen starved (blue) person. Or from Mars...

Glad to see you're trying color printing. Was it as hard as you thought?
If you get serious, I have an old Beseler PM-2L that we can talk about...

Jim



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zentena

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Since: Jun 03, 2004
Posts: 983



(Msg. 5) Posted: Mon Dec 15, 2003 12:13 pm
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Jim Phelps <Jim.Phelps.DeleteThis@mi.com> wrote:
 >
 > Be careful dialing in more filtration. You'll end up with a black haired
 > oxygen starved (blue) person. Or from Mars...

Could be interesting-))

 >
 > Glad to see you're trying color printing. Was it as hard as you thought?
 > If you get serious, I have an old Beseler PM-2L that we can talk about...


Easier. I'm using a picnic cooler and aquarium heater for temp control.
Other then the warm up time it's great. I'm going to either get the probe on
my analyser fixed or get it replaced.

Nick<!-- ~MESSAGE_AFTER~ -->
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user814

External


Since: Nov 23, 2004
Posts: 370



(Msg. 6) Posted: Mon Dec 15, 2003 7:25 pm
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

 >
 > Easier. I'm using a picnic cooler and aquarium heater for temp control.
 > Other then the warm up time it's great. I'm going to either get the probe
on
 > my analyser fixed or get it replaced.
 >
 > Nick

Cool, One more myth bites the dust. Color printing is not hard, expensive
and frustrating, well, maybe a bit frustrating...

Now if we can only get M.S. and the Zone System followers to understand
they're talking right past one another, saying the same things, but in
different ways, then the world would truly be a bit better...



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zentena

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Since: Jun 03, 2004
Posts: 983



(Msg. 7) Posted: Mon Dec 15, 2003 7:25 pm
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Jim Phelps <Jim.Phelps.RemoveThis@mi.com> wrote:

 >
 > Cool, One more myth bites the dust. Color printing is not hard, expensive
 > and frustrating, well, maybe a bit frustrating...

The only thing I bought that might be considered expensive was the color
enlarger. Even that was a good deal. The tubes are being almost given away
today. My tempering bath set me back about $50. Half of that for the picnic
cooler. I've got an idea to add a digital thermometer to it with the display
on the outside. Over all it shouldn't be much worse then the expensive Jobo
tempering box. But mine is big enough for me to use it for rolling the
tubes in. Won't handle anything bigger then 11x14 but that's because of the
length of the cooler.


 >
 > Now if we can only get M.S. and the Zone System followers to understand
 > they're talking right past one another, saying the same things, but in
 > different ways, then the world would truly be a bit better...


I haven't seen much of that for the last few months. Most of it is kill
filed. All I see is the odd reply.

Nick<!-- ~MESSAGE_AFTER~ -->
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mikescarpitti

External


Since: Jun 17, 2004
Posts: 1674



(Msg. 8) Posted: Tue Dec 16, 2003 11:50 am
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Jim Phelps" <Jim.Phelps RemoveThis @MI.com> wrote in message news:<3fdde06d$1_2@news5.uncensored-news.com>...
  > >
  > > Easier. I'm using a picnic cooler and aquarium heater for temp control.
  > > Other then the warm up time it's great. I'm going to either get the probe
 > on
  > > my analyser fixed or get it replaced.
  > >
  > > Nick
 >
 > Cool, One more myth bites the dust. Color printing is not hard, expensive
 > and frustrating, well, maybe a bit frustrating...
 >
 > Now if we can only get M.S. and the Zone System followers to understand
 > they're talking right past one another, saying the same things, but in
 > different ways, then the world would truly be a bit better...

Nahhh...............

Even though many have fallen or may fall into the grip of the
zoneheads and all the odious apparatus of Romam Numerals, we shall not
flag or fail. We shall go on to the end, we shall fight on the seas
and oceans, we shall fight with growing confidence and growing
strength in the air, whatever the cost may be, we shall fight on the
beaches, we shall fight on the landing grounds, we shall fight in the
fields and in the streets, we shall fight in the hills and in the
classrooms; we shall never surrender, and even if, which I do not for
a moment believe, we were subjugated and starving, we would carry on
the struggle.....until the zoneheads are driven from our land!<!-- ~MESSAGE_AFTER~ -->
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invalid_email

External


Since: Dec 15, 2003
Posts: 29



(Msg. 9) Posted: Tue Dec 16, 2003 3:06 pm
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

 >
 > Easier. I'm using a picnic cooler and aquarium heater for temp control.
 > Other then the warm up time it's great. I'm going to either get the probe on
 > my analyser fixed or get it replaced.
 >
 > Nick

Nick,

What chemicals are you using? I'll probably start with Tetenal Mono (room temp), but they are expensive ($30 for
processing 100 8x10 prints). The picnic cooler approach sounds like an economical way to use cheaper chemicals...

--Mike<!-- ~MESSAGE_AFTER~ -->
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zentena

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Since: Jun 03, 2004
Posts: 983



(Msg. 10) Posted: Tue Dec 16, 2003 4:44 pm
Post subject: Re: RA-4 filtration and exposure question. Basic [Login to view extended thread Info.]
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Mike <invalid_email DeleteThis @null.com> wrote:

 >
 > What chemicals are you using? I'll probably start with Tetenal Mono (room temp), but they are expensive ($30 for
 > processing 100 8x10 prints). The picnic cooler approach sounds like an economical way to use cheaper chemicals...


I'm using the Fotochem kits. The info sheet claims 200 8x10s per 1 US
gallon but there is always some waste when you pour out of the drum. So I
don't know how accurate that number is. You also need to worry about the
chemicals going bad. The concentrates supposedly will keep quite awhile but
the working solutions have limited lives. The Fotochem kits use slightly
higher temps and longer times then some of the other kits. I don't know why.

<a style='text-decoration: underline;' href="http://www.colba.net/~fotochem/" target="_blank">http://www.colba.net/~fotochem/</a>

With some graduates and some kids medicine droppers I made up small
amounts of working solution. Less of the developer that keeps the least more
of the bleach that supposedly keeps quite a while. Nice thing about the
drums is they use so little chemicals. I'm also using a home made stop.

Nick<!-- ~MESSAGE_AFTER~ -->
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