The standard offset ink sequence (the one that industry standard ICC profiles reflect) is KCMY. So if your proofer is set up to proof to an industry standard then that is the sequence you should run otherwise you will be creating unnecessary difficulties for yourself.what is the recommended printing sequence for offset packaging? we normally do kmcy; hope to get advise and inputs.
Technically you can run whatever ink sequence you want to. Just keep in mind that if you run anything other than KCMY you will no longer be running the same ink sequence that industry standard specifications were run at. Your gamut will be distorted relative to the industry norm - and that may have negative consequences depending on your customer expectations.Does your company try to print everything with cmyk? Do you run PMS colors when it comes to corporate color matches? If your not willing to incur the addition expense of running PMS colors for critical matches my preference for sequence is to run KMCY in most cases. Having a prepress profile set up for this sequence will be the best way to have success with it. By running KMCY it will allow you to print them hard to lay down purple combinations. The purple combinations will lay much smoother with KMCY.
You should get different results since the CM, CY, and MY overprints will be different. There is no standard screen ruling specific for offset packaging. There's quite a bit of FM screening used in that market (especially if extended gamut printing is used). But if you stay with AM then use the "Round Dot" (round through the tone scale) i.e. non-transforming/non-Euclidean dot shape/non-composed.i am set to re-profile the press; and will i get different results by using kcmy and kmcy? another thing, what is the standard screen ruling for packaging printing and the best dot angles for cmyk? thanks for all the inputs....
Gordo,Technically you can run whatever ink sequence you want to. Just keep in mind that if you run anything other than KCMY you will no longer be running the same ink sequence that industry standard specifications were run at. Your gamut will be distorted relative to the industry norm - and that may have negative consequences depending on your customer expectations.
Mnnnnnn...I don't think so.The "correct" color sequence after testing by PIRA and others is K-C-M-Y or C-M-Y-K (Black can be first or last). The reason PIRA explained is that the 'Red' (color) trap is better with M-Y together, and humans are very sensitive to the color Red. If you put C-Y together then the 'Green' would appear better BUT the Red is horrible! . . .
I don't consider myself a prepress guy. I don't think you're disagreeing with what I wrote. If you have to change ink sequence to get the job out of the pressroom - that's what you've got to do. But then you need to find out why and correct the cause.Gordo,
Id expect nothing less than your response from a pre press guy. The human standard for pro creation involves sexual intercourse. There are at times that couples must resign themselves to other methods. Such a deviation from the standard would not be my first choice, but can be for some, their only hope. I offered a work around that has proven at times to be effective. It may not be as fun as kcmy but it can get the job done.
I fully agree that the quality of the stock is the usual reason why color sequence at times needs to deviate from the industry standard KCMY. When it becomes apparent that a companies business model these days, is often built around purchasing sub par substrates, it makes perfect sense to default to a sequence that works under them less than optimum conditions. It is possible to fine tune KMCY to give best results under these circumstances.One of the largest issue not mentioned here is the quality of board, paper is not to bad but board from batch to batch you never know .We have an internal process heavy coverage blue purple color always goes MAG CYAN .We have a73" press and the poor quality of trap really shows its face because of the shear size of the press .We have good success with this process and all press crews follow this process so we can match relatively close on each press .
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