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Posted at December 13, 1901, 2:45 pm: Making something for printing first time can be very hard, and of course it is, it takes many years of experience to exactly how to manage your files. Therefore i wrote down some tips that can guide you in the correct direction. First i wanna say that these tip are not obligatory since every print job variates from the other, see this more as a rule of thumbs. DPI The classic issue, DPI is probably one of the most difficult thing there is to consider, and possibly also the most important one. You have probably already heard that 300 DPI is the correct number for printing, that is to a certain point true, but there are exceptions. Printing is beeing done from 72 to 300 DPI, depending on the material you print on. When you in your image editor open up your image size box, you'll see 3 different fields, pixels, inch and DPI First of, pixels has nothing to do with the size of your image, only inch counts, the number of pixles simply determinds the quality of you image, the more pixels the better. Try opening an image and change the DPI, you'll then see the number of pixels will change accordingly to the DPI you write. So to narrow it down, set the inch to what size you want the image, then set the DPI and the pixels will automaticly follow. Don't forget, you cannot make a 72 DPI into a 300 DPI, and then again, you actually can. If you make the size of the image smaller than it already is, the number of pixels will stay where it is, it doesn't have to be the exact same number, a few 100 more or less, ain't gonna hurt anybody. Bleed Bleed is made simply because it's impossible to cut the paper straight where you want it to. Therefore you make you documents a few mm. larger than you really want it to be. In Quark Express and other layout programs you can make the exact document size, and then pull the graphics outside of the document. Rich Black Rich black is used when you add text upon and image. When a rip is seperating your file in CMYK it's actually only seperating the CMY and not the K. The Black is printed upon everything, and is not knocked out from the other coloures. Therefore you are actually able to see through the black colour and see whats underneith it. What you can do is, you can make a new colour with 100% black and 60% cyan wich will give a blue touch to your black, if you want a more warm black you can add 40% cyan, 35% magenta and 30% yellow. You have to try a few times before you find whatever you like the best, just don't add 100% of everything, that will make your printer very upset. Raster Is small dots that defines how much ink you printer must add to you paper, raster is made by a rip and should really concern you, but i like to explain a little about it. If you look real closely to a printed image (papers are easiest to spot) you'll see the dots, as you can see lighter areas has smaller dots with further distance bestween them, and darker areas has larger dots with lesser areas between them. A rip seperates your work in to 4 plates with raster on them, one for Cyan one for Magenta, one for Yellow and one for Black. The raster defines how much ink of each colour to provide, and therefore when printed upon each other, you're able to get a perfect looking image. Too much ink It can be a problem when there's too much colour in a image, it's rarely a problem but it does happen every now and then, mostly with graphics rather than with images. There's no exact rule on how much is allowed cause it variates from material to material. But a good rule of thumbs is 330% colour. That means 100% Black, 100% Yellow, 100% Magenta and 30% Cyan, you should always try an keep it less than that. I should add that this variates from media to media, for example on a newspaper it's a maximum of 255% colour. File formats There are many different oppinions on what file format is the correct, and of course i have mine as well. Whether you wanna follow them is up to you. Vector files can only be stored as eps, so there's not much choice there anyway, just remember if you use Illustrator, save as version 8 or less. Bitmap files are different since you have alot more oppotunities. It is in my experience that with eps files, you get the best quality, it's rarely possible for the avarge person to see the difference from tiff and eps. But for the trained eye it's possible. In both eps and tiff, you have the option to compress the file, i highly recommend that you don't. Eps files should be stored as binary with tiff preview (or macintosh), some printers are still not able to handle jpg compression yet. ICC Profiles ICC Profiles is the kingpin, before we had them, we didn't need them, now that we have them, we can't spare them. ICC Profiles are really not neccessary, but they are indeed nice to have. On www.inosteve.dk you can download some basic ones. ICC Profiles are used to adjust coloures on bitmap images to fit a specific media. What you do is you assign a profile to you image, and you will now be able to see what it will look like when it's printed on the media the profile is made for. Basicly it's used so that the same image will get the exact same look on 2 different media. They're good little helpers and almost everyone use them these days. If you're printing some busniess cards they are obsolete, but for larger campaigns they're almost indispensable. Spot Colours (Pantone) A spot colour is a separate colour not defined by raster like CMYK colours. There are different kinds of standard pantone colours such as, C, U, CV, CVU, CVP, etc. C and U, which stands for Coated and Uncoated, are the most common and it's recommended you stick with those. Spot colours are mostly used in logos or to create a certain effect like metallic or glossy on matte material. Using Pantone colours can be expensive compared to using only CMYK, but you'll achieve a higher quality print. Sometimes you will have to convert your Pantone colour into CMYK for different reasons. Most people use Quark Express to do it, which I personally don't recommend. If you absolutely don't want to invest in a Pantone kit, Illustrator will make the closest match. I'd like to add that this article is incomplete, but for serveral reasons i felt it was important to post it anyway. Original of the message was taken from http://www.graphic-forums.com/ Replies:thanks ConeNo problem A full and copy read article will be on my new site, i'l... NICE FINALLY you decided to write this out, thx! I used to have these as articles on my personal site, but since the re... I didn't know you still had that forum Started it back up a bout a week ago. Well i'm just gonna have to register if you don't mind Love to have ya there Cheers. Very informative thread! I hope you dont mine me asking, does choosing... To answer your first question No, choosing a P colour in Photoshop ... Wow thank you very much for you help. I posted this in the other thread, but thinking about it and due to th... Ash, Use what you are most familiar with, if its Illustrator 10, us... yep thats great again man, youre a real help around here. Cone to elaborate on the pantone thing a bit. I was actually gonna write a whole article on trapping alone, but neve... You use Pantone when the color cannot be had through other processes. Other Topics of Graphic Forums:Happy Birthday Dre!Got Illustrator..........drew something Hey Everyone PHP Help new to site, please crit ^^ about spammers usability New Pepsi Logo New website 1 Euro Trip 2005-2006 (shots tidied up) I'm looking for a program... imaginary nuance. TotalGFX photo quality problem 1 New Verizon Billboard Advertisement Wish Me Luck! chat-scape.com Dj Nik Bean - BEEF IV howdy doodie How to resize .GIF Images Dj Chainsaw, Noe Doe - Mystere - True Playa Project Rawr CarrotClock Spirit fence : keerisen Photoshop CS2 problem Request a tutorial? Logo Critique and Survey Would you wear this shirt? X-Fest Need help with eps file ABSOLUT $ EX - May Be NSFW |