Datacolor User to User Support Group.

Hi,
  I'm have been told that different base (reflective/none or color)
will affect the outcome of the patch reading because the base will
somehow able to affect the accuracy of the reflective light. Do any of
you have any recommendation on what base I should use to read the
color patches?
White paper board or black paper board or ??

--- In colorvision_group@yahoogroups.com, "nwkcmk123" <nwkcmk123@...> 
wrote:
>
> Hi,
>   I'm have been told that different base (reflective/none or color)
> will affect the outcome of the patch reading because the base will
> somehow able to affect the accuracy of the reflective light. Do any 
of
> you have any recommendation on what base I should use to read the
> color patches?
> White paper board or black paper board or ??
>
The only recommendation I have seen is to use the same material that 
you printed the target on.

Brian

Brian Smith wrote:

>
>The only recommendation I have seen is to use the same material that 
>you printed the target on.
>
>  
>

Exactly.. Get a stack of the original media...
Keith

 
Keith Krebs

"Just some guy," caretaker of the Multiverse's largest EPSON printer 
User Community (highly recommended by Vogon Poets and MegaDodo 
Publications), at:
http://groups.yahoo.com/group/EPSON_Printers/
and  the Multiverse's largest Canon printer User  Community at:
http://groups.yahoo.com/group/Canon-printers
"For the rest of you out there, the secret is to bang the rocks together 
guys"

 

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Hello together,
because I use many papers which have printed their brand names (Epson,
Canon) on the backside, I recommend (and I do so with success) to use
a dark base to avoid mostly any reflection. Viewing against the light
one can discover that one printed brand crosses a patch and annother
patch is "brand clean". So I expect that a dark base brings in more
even patch readings than a bright one.

Best,
Peter



> >The only recommendation I have seen is to use the same material that 
> >you printed the target on.
> >
> >  
> >
> 
> Exactly.. Get a stack of the original media...
> Keith
> 
>  
> Keith Krebs
> 
> "Just some guy," caretaker of the Multiverse's largest EPSON printer 
> User Community (highly recommended by Vogon Poets and MegaDodo 
> Publications), at:
> http://groups.yahoo.com/group/EPSON_Printers/
> and  the Multiverse's largest Canon printer User  Community at:
> http://groups.yahoo.com/group/Canon-printers
> "For the rest of you out there, the secret is to bang the rocks
together 
> guys"
> 
>  
> 
> ****************************************************************
> CONFIDENTIALITY & COPYRIGHT NOTICE:
> This e-mail message, including attachments and contents, is ©
Copyright, 
> Keith Krebs, 2001-2006, All Rights Reserved. It is expressly for the 
> sole use of the intended recipient and may contain confidential and 
> privileged information. Absent the express written authorization of the 
> author, any unauthorized review, use, disclosure, transfer, or 
> distribution is explicitly prohibited and taken at your own risk. If
you 
> are not, or are unsure whether you are, the intended recipient, please 
> contact the sender immediately and destroy all copies of the original 
> message. Violations will be prosecuted to the FULL extent allowed under 
> applicable civil and criminal law. Imagery published or distributed in 
> violation of these conditions shall be subject to a $1500/image 
> liquidated damages charge, in addition to any applicable Copyright 
> violation penalties.
> 
> POV IMage Service Banner
> ****************************************************************
> { The P.O.V. Image Service Website is still at
http://www.p-o-v-image.com/ }
>

--- In colorvision_group@yahoogroups.com, "peter_woelk"
<peter_woelk@...> wrote:
>
> 
> Hello together,
> because I use many papers which have printed their brand names (Epson,
> Canon) on the backside, I recommend (and I do so with success) to use
> a dark base to avoid mostly any reflection. Viewing against the light
> one can discover that one printed brand crosses a patch and annother
> patch is "brand clean". So I expect that a dark base brings in more
> even patch readings than a bright one.
> 
> Best,
> Peter
> 

Just a question here but .. if the brand shows through the paper
enough that the patch reader can detect a difference between a "clean"
patch and a branded patch .... does it mar your picture unless it also
is mounted on a dark substrate?

If you were trying to be as accurate as possible the reading should
technicaly be done on the mounting substrate.  Any difference less
than one delta E is by definition going to be extremely difficult to
see for the average person.

Tom,
yes indeed I do mount my prints on that black paper, the idea to read
patches on a black base hit me when I saw that the brands show trough.
I didn't measure the difference, I just do it to avoid any reflections
from the base because the backside of my paper is obviously unevenly.
My idea was, to get a patch reading without any variations from behind!

Best,
Peter


--- In colorvision_group@yahoogroups.com, "Tom" <ttrostel@...> wrote:

>
> --- In colorvision_group@yahoogroups.com, "peter_woelk"
> <peter_woelk@> wrote:
> >
> > 
> > Hello together,
> > because I use many papers which have printed their brand names (Epson,
> > Canon) on the backside, I recommend (and I do so with success) to use
> > a dark base to avoid mostly any reflection. Viewing against the light
> > one can discover that one printed brand crosses a patch and annother
> > patch is "brand clean". So I expect that a dark base brings in more
> > even patch readings than a bright one.
> > 
> > Best,
> > Peter
> > 
> 
> Just a question here but .. if the brand shows through the paper
> enough that the patch reader can detect a difference between a "clean"
> patch and a branded patch .... does it mar your picture unless it also
> is mounted on a dark substrate?
> 
> If you were trying to be as accurate as possible the reading should
> technicaly be done on the mounting substrate.  Any difference less
> than one delta E is by definition going to be extremely difficult to
> see for the average person.
>