Re: It's The White Stupid
Re: It's The White Stupid
- Subject: Re: It's The White Stupid
- From: Terence Wyse <email@hidden>
- Date: Thu, 04 Oct 2012 14:08:28 -0400
Louis, the calculator Mike pointed you to is for creating a new GRACoL dataset with the white point adjusted for a different substrate. In a way, it has nothing to do with your inkjet printer, it's all about creating a different GRACoL profile to use for soft-proofing and as a source profile for an inkjet or other proof. If you already have an output profile for your inkjet printer, you would simply use the new GRACoL profile as source and convert/print using absolute colorimetric rendering so the new substrate is imposed on your inkjet printer/paper.
One caveat....make sure you use the same spectro filtration when you sample the stock you want to simulate that you used when creating your inkjet printer's output profile. If you have a filtration mismatch when dealing with OBA papers, the simulation will not come out correct...if you use the same filter for both, it should be reasonably close.
Terry
______________________________________
Terence Wyse, WyseConsul
Color Management Consulting
G7 Certified Expert
FIRST Level II Implementation Specialist
On Oct 4, 2012, at 1:11 PM, Louis Servedio-Morales <email@hidden> wrote:
> Thanks Mike. The problem I see with this calculator is that I have no way of printing on the final "substrate" with my inkjet printer to read patches from. The best I can do is find some inkjet paper (coated for inkjet inks), and I do have a few, who's white is similar in paper white brightness and possible OBAs as the final substrate to be used. I can build a good RGB profile to print on this paper straight up with the help of i1Profiler and OBC profiling. But can I use this in any way to simulate press conditions with the non GraCol paper via any icc sophistry?
>
> -Louis
>
> On Oct 3, 2012, at 7:05 PM, Michael Eddington <email@hidden> wrote:
>
>> Gracol has a substrate whiteness calculator to compensate for
>> differences in paper whiteness, which has some degree of success with
>> papers with OBAs. It's available on the Idealliance website. You may
>> find it useful.
>>
>> Mike Eddington
>>
>> Sent from my iPhone
>>
>> On Oct 3, 2012, at 5:22 PM, Louis Servedio-Morales
>> <email@hidden> wrote:
>>
>>> “It’s the white stupid” has been my most recent mantra. I’m a retoucher with a new client who’s printing ranges from “natural” white papers to papers containing high amounts of OBA’s. So, in attempts to please this client I have decided to fall into the OBA rabbit hole without any detail understanding as to how printers use the icc standards workflow ( i.e. GraCol) when printing to these papers. As I understand it and putting it simply, the GraCol control strip can only pass certification when printed properly on paper containing no OBAs and only a specified amount of brightness (i.e. L=95). So this leads me to two main issues. One is how to proof my work for this client and simulate how it would look on a bright white paper stock (e.g. McCoy Silk)? Well aware that the white of the paper (blueness) influences the overall color well into the midtones. And two, can a printer make use of the "non-standard" proof and file that created it? Any help on this matter is appreciated.
>>>
>>> Thank you,
>>> Louis Servedio-Morales
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Do not post admin requests to the list. They will be ignored.
>>> Colorsync-users mailing list (email@hidden)
>>> Help/Unsubscribe/Update your Subscription:
>>>
>>> This email sent to email@hidden
>>
>
>
> _______________________________________________
> Do not post admin requests to the list. They will be ignored.
> Colorsync-users mailing list (email@hidden)
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden