Trucos de diseño para diseñar como locos
A few months ago trying to resolve a doubt about the ability to print a grayscale PDF directly using Indesign engine, which how I explained at the time seems not to have been considered by Adobe’s applications developers. One of the possible solutions to this problem occurred to me after publishing the post was to preparing all images in grayscale and then delivered to the printer only the black plate.
As I told you then, printing options let you solve this problem without making too many juggle writing directly PDF using Adobe PDF own engine instead of the application’s one. Also thanks to Adobe PDF, and now I mean the reason of this publication, you would have the possibility to generate the different separations in a document and, if not find any other solution, to send only the black plate to the printing provider.
Separations of a document are the various plates which are generated therefrom. A composite CMYK page is originally formed by the four plates for process colors. When writing a PDF using this color space each page has a description of each process color, and if you used some extra color for each one too. These descriptions of which I’m talking will become subsequently on the process plates, in case it is necessary to separate them for offset printing, for example, when the PDF is processed by the printer. You can also send previously separate documents, to achieve this just write a postscript file by enabling the Separations tab in the Output menu. Thus processing the document, either with Adobe Distiller or a similar tool will produce a PDF document where each page will be multiplied by the number of process colors plus the number of additional colors which have been used.
To write a postscript document is necessary to select the printer’s postscript description file. That is, the file containing the instructions for using a postscript printer. Usually, except that you have the appropriate file of the printer used by the printing provider, it is best to select AdobePDF 8.0 or similar.
Currently, when a document is ready to print, it’s enough to generate a PDF with CMYK composed color space, ie, a PDF document tha tcontains the information of the four process inks: cyan, magenta, yellow and black. Also if you have included a spot color in the document is possible, using the appropriate PDF options, to store also this ink within the PDF document or convert it to process values.
Once the postscript file or PDF is sent to the printer this will separate the various plates, in the case of a composite color document and if it’s required. After documents are taken separately and are converted by a raster image processor, or RIP, in the image to be processed in the iron of each of the colors. These steps also choose the necessary options: trapping, ink density, etc …