A New Series on HD Prepress File Preperation
From The Art Director — Bobby Lee
Before reading please read part 1, part 2, part 3
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Part IV – Tips & Techniques
This weekly series is offered as a prelude to the launch of our exciting new FastTrak File Processing program coming this March. The items covered in the series provide solutions to the most common problems we encounter with client submitted files. Our goal is to educate our clients on techniques to minimize and even eliminate delays on proofing and printing alike.
For those who are new to preparing files for printing, or for those more experienced designers wishing to brush up on technique, we hope this prelude will be a valuable learning experience whatever your level of expertise. At the very least, the basic tips presented in this series will make the design process go more smoothly, and at most they will help eliminate the likelihood of someday hearing those dreaded words…“we ran into a problem with your files.”
8. Avoid “Marginal” Margins
Text or graphics placed too close to outside margins run the risk of being trimmed off during bulk trimming. Outside margins measuring less than the recommended 1/8” minimum—as shown on our templates—run the risk of appearing uneven when trimmed in bulk. Templates are available for almost any item you can print at Copy Craft, and each one shows the recommended minimum margin and bleed in relation to trim or die lines. With six different file types to choose from, it’s very easy to download a template to build your document correctly from the beginning or double-check a file that’s already finished. Just remember to remove the template before sending in your final file.
Smaller Documents: Outside margins on small documents, such as business cards, tickets, etc., should be a minimum of 1/8“. Increase margins to 1/4” for slightly larger items such as postcards and invitations. Documents such as door hangers and similar die-cut items benefit from margins of 1/4″ to 3/8”.
Larger Documents: Outside margins on larger documents should be increased in proportion to their size. Brochures and rack cards benefit visually from margins of 1/4” or more. Increase the margins for posters and banners accordingly.
Envelopes & Small Spot Color Documents: Full Color or Process Color envelopes require a 3/8“ clear margin at the top of the envelope for the press to grip the envelope and pull it through the press. Most spot color documents, such as forms, invitations, letterhead, etc., require a 3/8” clear border at the top for the press to grip the paper. Spot color envelopes require a 3/8” border at the top or at the right, as an option. Envelopes requiring full bleed on all sides must be printed on larger flat sheets that are then die-cut and converted into envelopes afterwards, so in this case please specify “full bleed” when placing your order as both prices and turnarounds are greater.
9. Thin Borders on Trim Lines
A thin rule border along the trim of the document is impossible to print and trim consistently so we do not guarantee the outcome of such a design. If your document requires a continuous color border, please supply a minimum 1/8” border inside the trim plus 1/8” bleed outside the trim. (If you are in the habit of creating a 1 point ruled box to mimic the size of your document on a larger page, try setting your Page Size for the document to match the trim size instead, as suggested in the first tip on Part II of this blog.)
10. Folds & Templates
Folding is affected by a variety of things including paper weight, the folding equipment being used, and the number of times it goes through the equipment. Panel sizes on a brochure can vary from piece to piece depending on the fold. For example: panel sizes are different on a standard trifold brochure than a comparably sized Z-fold brochure. Copy Craft has built an extensive library of well-tested templates to assist you in laying out files for accurate folds. Please visit copycraft.com/templates and select the template that matches your job to avoid any folding problems. Our templates are available in six different file formats. Some are best suited for initial layout design and others for double-checking a layout before submitting the file to be printed. Most brochures have separate templates for each side. Some brochure templates make a distinction between paper weights, so if you are not sure which paper weight applies to your order, check with your sales representative. He or she will be happy to direct you to the proper template to successfully build or double-check your files. Always remove any templates before submitting your files.
11. Rich Blacks & Small RGB Black Type
Rich blacks are most commonly used to create rich, deep black backgrounds, large black accent areas and large headline type. Our recommended mix for rich black is 40% Cyan, 30% Magenta, 20% Yellow and 100% Black (40,30,20,100). Avoid using rich black for small type. The same is true for RGB Black as it becomes multi-color type when converted to CMYK. Small, multi-color type can be difficult to register across a large sheet on the press, and may even present a color halo effect. We recommend setting small black type in 100% Black only. Be aware that programs limited to RGB color palettes, such as Word and most versions of Publisher can cause problems in this regard and may even require reformatting at an extra charge.
12. Overprinting
The use of selective overprinting is an art, but accidental overprinting can lead to disappointment on the press. Here are a few things to watch for, and a few tips you can use to preview final output before sending in your files.
The most common problem we encounter with overprinting is white type set to overprint on a color background. It basically just disappears. The effect is similar to applying the Multiply effect to white type. Check your Attributes window in most programs to see if either the Fill or Stroke is set to overprint. Programs like InDesign and Illustrator will let you preview overprinting. When in doubt, check it out.
Other overprinting errors tend to occur in complex vector logos and complicated illustrations done in Adobe Illustrator, Corel Draw or other vector programs. If you are developing this type of artwork in Illustrator, select “Overprint Preview” from the View menu to check your progress. If you have an earlier version of Illustrator, you can always either rasterize the art in Illustrator or drop the file in Photoshop to preview the artwork as it will appear after being rasterized by high-end commercial RIPs (Raster Image Processors).
13. Gradients
The most common problem with gradients is banding. Banding typically occurs when a gradient is spread across a large area and the difference between the starting color and the ending color of the gradient is minimal. For example: if you have a color shift in a single color gradient of 4% across an 8” area, the computer is basically asked to make four 2” steps. Sometimes those steps are visible as bands. It’s possible to minimize this problem by using a broader CMYK color mix on each end of the gradient. For example, try a 3-color green rather than cyan and yellow only green. But for all practical purposes, to eliminate banding you will most likely have to increase the number of steps in your gradient by going from a lighter color to a much darker color, or vice versa.
Color-to-Black gradients sometimes develop a grayish blend in the middle. This type of gradient works better if you add the same color values you start with on one end of the gradient to the process black on the other end. Example: on a Green to Black gradient, rather than going from a C 100, Y 100 green to K 100 only black, start with C-100, Y-100 at one end and go to K 100 + the C 100, Y 100 on the other. Try it.
Spot-to-Spot gradients sometimes look richer if you create two separate Spot-to-White gradients going in opposite directions and then position one to overprint on top of the other. Try it the next time you work with spot gradients.
14. Spelling and Grammar Errors
Please spell check your documents before submitting them for printing. Our proofing system gives you one last chance to check for errors, so please don’t pass up the chance to catch them. We are not responsible for any spelling or grammar errors.
Next Week and beyond…
Next week the series will cover even more tips and techniques for proper prepress file preparation. By the time our new FastTrak File Processing program is launched around 20 topics will be covered, so please bookmark this page or make a copy of these tips for future reference. Also, feel free to send a link to whomever you think would benefit from the referral. We look forward to serving you and hope this information will be beneficial to you, your organization or anyone else who prepares prepress files for you.
Our goal is to continually inform our clients of improvements in our system so you can experience quicker turnarounds and more accurate printing. You can find additional setup tips on our Support Center at copycraft.com. Please feel free to call if you have any questions beyond the items listed here: 1.800.794.5594.
Watch for the launch of our exclusive FastTrak File Processing program coming to Copy Craft Printers in March.












