Re: Pigments for neutral color balance in gum: (Re: Fish Eyes again)
Loris, ok, I understand your point, keep up the good work. Regards, Yves ----- Original Message ----- From: "Loris Medici" <mail@loris.medici.name> To: <alt-photo-process-l@usask.ca> Sent: Thursday, September 18, 2008 7:37 AM Subject: Re: Pigments for neutral color balance in gum: (Re: Fish Eyes again) > Thanks Yves, I do RGB separations -> the algorithms and programs you > mention are for CMYK (if I'm not mistaking), therefore useless to me. I > don't want a perfectly color-correct result, just a convincing > approximation + more neutral blacks that's all (since being consistent is > almost impossible because I mix the color for each layer by hand, w/o > using stock gum/pigment solutions). On the other hand, I think one can > build a custom CMYK profile (measuring each primary color and the > combinations with a spectophotometer) for proofing and manipulate the > color balance on screen in order to get the desired result <- (probably!?) > but this isn't what I want to do. > > Regards, > Loris. > > > 18 Eylül 2008, Perşembe, 2:19 pm tarihinde, Yves Gauvreau yazmış: > > Loris, > > > > the starting "colors" you use are important for sure but the proper color > > separations may prove more significative in obtaining neutral print > > values. > > But you will need special tools and software to do this but it will also > > take the guess work out of the process. I would argue that this problem is > > one of the many reason color management was design for. To my knowledge, > > there is even a special algorithm design for this specific problem, if > > memory serve me well I think it is called the gray axis algorithm. Combine > > this with a software program that can create the required separations and > > you should be in business. > > > > Hope this helps, > > Yves > >
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