Digital BW, The Print

Hi folks,
I need some help, always that I try gradient skies I get gray strips
instead of a soft gray scale between the light and dark end. What am I
doing wrong? I have an Epson 1280 and use MIS VM inks.
Thanks in advance
Renan Lopes
Rio de Janeiro

Renan, have you printed a step wedge?  What do you see?

Can you give more details about your set-up?

Bill

on 3/11/02 10:02 PM, Renan Lopes wrote:

Hi folks,
I need some help, always that I try gradient skies I get gray strips
instead of a soft gray scale between the light and dark end. What am I
doing wrong? I have an Epson 1280 and use MIS VM inks.
Thanks in advance
Renan Lopes
Rio de Janeiro


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[Non-text portions of this message have been removed]

Can you post ALL of your settings. Every single one you use. It will be helpful in diagnosing the trouble. I use the same setup and get NO
banding or posterization at all.

Jerry

Renan Lopes wrote:

> Hi folks,
> I need some help, always that I try gradient skies I get gray strips
> instead of a soft gray scale between the light and dark end. What am I
> doing wrong? I have an Epson 1280 and use MIS VM inks.
> Thanks in advance
> Renan Lopes
> Rio de Janeiro
>
>
> Please visit the Group Homepage to check the Files, Bookmarks, Polls and other resources as they are often being updated. The page is at:
>
> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint
>
> Please follow these basic guidelines:
> - Include your full name with your message.
> - Include the address of your website, if you have one.
> - As threads develop, trim off excess portions of earlier messages to keep them short.
> - As the topic of a thread changes remember to change the subject header.
> - Good manners are required at all time. No personal attacks or "flames."
> - Complete your Yahoo profile.
> - Before posting a question, search the message archives and the various resources on the homepage.
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

I use the Paul's curves and his workflow.What  I see is a soft gray scale on my screen until I load the curves then I see some strips and
these strips are printed on the paper.
No Bill, I don't print a step wedge.
Renan

Can you post ALL of your settings. Every single one you use. It will be helpful in diagnosing
the trouble. I use the same setup and get NO
banding or posterization at all.

Jerry

Bill Morse gravada:

> Renan, have you printed a step wedge?  What do you see?
>
> Can you give more details about your set-up?
>
> Bill

Renan-

With digital printing you need to start with a step wedge- it will identify
where in the tonal scale you are having problems.  Also, Jerry asked that
you list all of your settings, so that he could help you.  Try printing out
a step wedge, and in the process, note every setting you see listed in the
page setup, printing, and PhotoShop color settings dialog boxes.  Then write
back, and tell us what those settings are.  Without that, there's no way to
tell what's wrong.

Also, which printer and computer OS are you using?

Bill

on 3/12/02 8:43 PM, Renan Lopes wrote:

I use the Paul's curves and his workflow.What  I see is a soft gray scale on
my screen until I load the curves then I see some strips and
these strips are printed on the paper.
No Bill, I don't print a step wedge.
Renan

Can you post ALL of your settings. Every single one you use. It will be
helpful in diagnosing
the trouble. I use the same setup and get NO
banding or posterization at all.

Jerry

Bill Morse gravada:

> Renan, have you printed a step wedge?  What do you see?
>
> Can you give more details about your set-up?
>
> Bill


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- Include the address of your website, if you have one.
- As threads develop, trim off excess portions of earlier messages to keep
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[Non-text portions of this message have been removed]

Renan,

Without detailed info it is hard to know.

One thing that does happen is when applying an RGB separation curve like
Paul's, is some "combing" or lose of the image's data. Generally this is not
a problem but if you already have combing in the image from strong
adjustments the addition of the separation curve can push it over the edge.

Check the Histogram of the image before and after you apply the curve. If
you have large gaps this may be your problem. The solution would be to work
in 16-bit mode rather than 8-bit mode where the extra data protects you form
this type of problem. Working in 16-bit is more cumbersome but I find it
sometimes necessary and some people do all of their work in that mode.

Martin Wesley

----- Original Message -----
From: "Renan Lopes" <renanlopes@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Tuesday, March 12, 2002 5:43 PM
Subject: Re: [Digital BW] Gradient skies


> I use the Paul's curves and his workflow.What  I see is a soft gray scale
on my screen until I load the curves then I see some strips and
> these strips are printed on the paper.
> No Bill, I don't print a step wedge.
> Renan
>
> Can you post ALL of your settings. Every single one you use. It will be
helpful in diagnosing
> the trouble. I use the same setup and get NO
> banding or posterization at all.
>
> Jerry
>
> Bill Morse gravada:
>
> > Renan, have you printed a step wedge?  What do you see?
> >
> > Can you give more details about your set-up?
> >
> > Bill
>
>
>
> Please visit the Group Homepage to check the Files, Bookmarks, Polls and
other resources as they are often being updated. The page is at:
>
> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint
>
> Please follow these basic guidelines:
> - Include your full name with your message.
> - Include the address of your website, if you have one.
> - As threads develop, trim off excess portions of earlier messages to keep
them short.
> - As the topic of a thread changes remember to change the subject header.
> - Good manners are required at all time. No personal attacks or "flames."
> - Complete your Yahoo profile.
> - Before posting a question, search the message archives and the various
resources on the homepage.

>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

Something is very wrong. I get beautiful prints from his workflow. THere are dozens of settings and if you have just one that is not
correct, it can totally throw your prints off. That's why I asked you to post ALL of your settings.

You are printing a RGB file, and your curve is loaded as an adjustment layer in photoshop? Heavy weight Matte setting for your paper? No
color adjustment? 1440 DPI? Error Diffusion? Same as Source selected in the print dialogue box? Adobe RGB setting selected in Photoshop
under color settings? Paul's curve is on TOP of all the other layers in your photoshop document?

You should NOT get banding on the screen. if you do, something is very wrong.

You MUST print a step wedge. It's the only way to tell  what is going on. Make a black and white gradient in photoshop and posterize it to
21 steps. Load Paul's curve with all the above settings and see what you get.

Jerry




Renan Lopes wrote:

> I use the Paul's curves and his workflow.What  I see is a soft gray scale on my screen until I load the curves then I see some strips and
> these strips are printed on the paper.
> No Bill, I don't print a step wedge.
> Renan