Sunday, October 3, 2010

To linearize your CtP plates or not? Part three.

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  1. First of all, i must say i have high regards for you and your opinions.

    AIDO (http://www.aido.es/en) is a technical institute is Spain, highly regarded are top experts in Graphic Arts. In the offset quality section, they do everything, from chemical analysis of ink, to ISO 12647 certifications.

    Here is a guide they provide freely on their website (after registration, which is also free): http://www.gestiondecolor.com/guia-buenas-practicas-de-offset

    For your convinience can get it here:http://rapidshare.com/files/423017603/guia-buenas-practicas-iso12647-baja.pdf

    In pag 21, where is says Ensayo 1, second point, it says " Producir las planchas del ensayo lineales, calibrando cuidadosamente el CtP", which translates to: Make the the testing plates linear by carefully calibrating the CtP.

    This is just to show that, in the same way that i don't agree with you, and think that 2 curves is a best system, the "authorities" don't agree with each other either.

    Best regards

    Tiago

    Ps. Sorry for my bad english, it's not my main language. :)

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  2. @ Anonymous/Tiago

    Thank you for your comment. Yes, authorities can disagree. That is why they need to provide solid, testable, reasons why they are recommending one method over another. It is not enough to say "Do it this way because I say it should be done that way." It is not enough for you to say that you don't agree with me, and think that 2 curves is the best system unless you can explain exactly why I am wrong and you are right. If you cannot then it is just your opinion and without evidence to back it up it is not a credible opinion.

    This is what I am trying to do with these posts. Although it is possible that a two curve system is the best, every time I look at the workflow and at the examples that people give me I cannot explain why a two curve system is better.

    I think that AIDO's recommendation to linearize the plates is based on the old film workflow as shown in the table of dot gains on page 15. It is based on film workflow thinking. I was told very recently by an ISO expert that you cannot use FM screens for publications because the dot gains would be too high and therefore not meet the ISO standard.

    It was hard for me not to laugh.

    I have made changes to my post about "authorities" Thank you for pointing out that problem to me.

    best, gordon p

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