Re: Cyan overlay when printing with Epson 3800
Re: Cyan overlay when printing with Epson 3800
- Subject: Re: Cyan overlay when printing with Epson 3800
- From: Tom Lianza <email@hidden>
- Date: Fri, 13 Jul 2012 06:10:07 -0400
- Thread-topic: Cyan overlay when printing with Epson 3800
Well Martin,
Let's look at what you just said:
>if you print a TIFF image which is a 2" white square on an A2 sheet
> the Profilemaker profile will cause the Epson printer to put a cyan dot from
> the edge of the 2" square (which will be a clean white) all the way to the
> edge of the paper."
As you have pointed out, the image, itself, is correctly rendered, the scum
dot occurs in the non image area. What does the profile have to do with
that area? Nothing....If you use the same profile on an HP printer, no
problem. Use the same profile in a Professional Rip: no problem. Did it
ever occur to you that we are doing something that is covered in the
specification, but not correctly implemented in some part of that specific
instance of the Epson-Apple print path? By the way, when I used my PC with
my Epson, there was no problem, but I do see the issue on my Mac system. Do
you honestly believe that when we discovered the problem, we just ignored
it? I can assure you, that I didn't ignore it and the team that works on
the profile generation did not ignore it. The profile was tested using a
number of in-house and third party tools and many different vendor print
paths The profile was examined by third parties and as you see from
Andrew's post, no one else seemed to have an issue. We passed images and
profiles to all the parties involved for testing and contacted Apple. Have
the other parties looked at the issue? I honestly don't know.
I don't doubt that there is a specification interpretation problem between
vendors. I am co-chair of the ICC and I see this problem all the time. The
subtleties, particularly in the area of curves within a 3d-lut profile can
be quite confounding to some vendors. I will say this: if something happens
outside of the image rendering path, it is outside of our field of expertise
and responsibility. If any company comes back to us with questions about
our profiles, we take those questions very seriously and work to resolve the
issue. I have not heard that we got any vendor feedback on this issue. I
will check on this issue, but I am pretty certain there has been no
resolution on the part of the other vendors.
Regards,
Tom
On 7/13/12 3:46 AM, "Martin Orpen" <email@hidden> wrote:
> On 13 Jul 2012, at 00:27, edmund ronald wrote:
>
>> I'm going to quietly watch this discussion from the sidelines :)
>
>
> It's old news.
>
> I wrote about it here in 2010.
>
> It was discussed again twice in 2011 under the headings like:
>
> The dreaded Epson/OSX/Snow Leopard Scrum dot issue
>
> And:
>
> Aperture Paper White
>
>
> Note the absence of mentions of Profilmaker when, in fact Profilemaker v2
> profiles are the common denominator here that trigger the NULL, non-pinting
> areas of the sheet to go cyan.
>
> To explain this again to colour management 'experts' that haven't seen this
> happen: if you print a TIFF image which is a 2" white square on an A2 sheet
> the Profilemaker profile will cause the Epson printer to put a cyan dot from
> the edge of the 2" square (which will be a clean white) all the way to the
> edge of the paper.
>
> I'd still be interested to know why this happens *from* X-Rite.
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