[argyllcms] Re: Create RGB printer .ICM to use in Photoshop CS5
- From: Phil Cruse <pcruse@xxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Thu, 20 Oct 2011 10:34:46 +0100
Hi Marcus,
I think you've hit the nail on the head!
On 20 Oct 2011, at 09:18, Marcus Andersson wrote:
> Hi,
>
> I have a question regarding calibration. Is it really meaningful to produce
> a .cal for an RGB printer with 8 colors? I don't know that much about these
> things but theoretically a CMY linearization on such printers would involve
> all eight colors, right? I am asking as a novice, thanks.
I can't see how the extra Red, Green, etc., or even the normal Black ink can be
linearized in "RGB". These channels are generated by the printer driver.
Cheers
Phil
Phil Cruse
http://www.colourphil.co.uk
>
> Regards,
> Marcus
>
> On October 20, 2011, at 10:01, Wim Hertog wrote:
>
>> Hmm, so the profiling step alone should do the trick then? I thought
>> profiling only characterized the printer and you needed the calibration step
>> in order to actually change the printing behaviour. If the profiling step by
>> itself is enough to create prints matching my (with argyll) calibrated
>> monitor, I must be doing something wrong somewhere...
>>
>> After following the tutorial and profiling the printer the gamut shape and
>> softproof look perfect. Very similar to what I get from PM5. The printout
>> using this profile results in a horrible yellow-brown cast though. I follow
>> my usual workflow while printing: windows CM is turned off in the canon
>> driver and photoshop manages colours using the generated profile. I'm pretty
>> sure it's not double profiling anywhere.
>>
>> I must be doing something wrong somewhere but I literally read the tutorial
>> a 100 times and tried everything and always get the same result: a strong
>> yellow brown cast together with totally blocked shadows.
>>
>> Anyone has any idea what's happening or....a link to another tutorial to
>> double check?
>>
>> Wim
>>
>>
>> 2011/10/20 Graeme Gill <graeme@xxxxxxxxxxxxx>
>> Wim Hertog wrote:
>> > Now, the above workflow results in some strange outcomes: the colours of
>> > the softproof in photoshop are completely off (the same happens when I
>> > convert to above generated icc file). The image prints ok (ok doesn't
>> > mean as good as I want though), nothing like the softproof shows.
>> > However, when I don't add the .cal file to the icm (last step), the
>> > softproof is perfect but the actual printed image is horribly wrong
>> As suggested in the tutorial, get just profiling working first. There
>> are too many variable otherwise, and the first thing you do in diagnosing
>> a problem is break things down into individual steps anyway.
>>
>> Graeme Gill.
>>
>>
>
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