Print Buying Direct

For all the rationalisation, mergers and acquisitions that have taken place, the demand for print has largely remained in line with GDP (Gross Domestic Product). As GDP has risen, so has the volume of print but how the printing pie has been cut up and the number of mouths getting what could be considered a fair share has perhaps dropped.

The next couple of years many economists are suggesting we may see some of the toughest trading conditions seen since the late 1970s, but economists are invariably wrong and it is fair bet that they will be wrong for attributing tough trading conditions in the printing industry on the economy. Trading conditions are certain to become turbulent; how can there be stability when several manufacturers introduce presses, including long perfectors, into the marketplace capable of changing all their plates in a little over a couple of minutes, carrying out make-readies in 10 minutes or less? And to boot, web-fed digital presses producing 1800 A4s per minute.

There is another element that is certain to bring instability to our industry that has little to do with economic forces. Customer expectations are changing in a rather profound way. One of the most significant effects of the digital age is the influence on customer expectations. No, not the speed at which they expect to get the job, though that is given, it is their quality expectations; printing from the Internet has meant a huge change in perceptions of quality, strength of design and overall appearance.

Much of today’s print is related to supplying information; brochures, reports, products leaflets, general information and this is delivered usually via an office printer using 11 and 12 point sans serif type printed on white 90gsm laser type paper. The result is more than adequate, with colour where appropriate printed at 600 and 1200dpi. What we are seeing is a fundamental change in our expectations of what is appropriate. Just as wearing a tie in important meetings can seem outmoded and stuffy- print is facing a similar change, with what is ‘fit for purpose’ the new driving force. Certainly collar and tie printing will always have its place, but the situation will arise more often where a superbly produced 16 page brochure in six colours with multiple matt and spot UV overprints will look aggressive and inappropriate. You have been warned.

For more information on Press Technology or printing in general please don’t hesitate to contact us at The Printing House (Print Buying Direct)

Although many designers still work manually, most illustrations, photographs and graphics are created and edited using digital tools. Software such as Photoshop or Illustrator, digital capture with a scanner or digital camera, all allow us to create and manipulate graphics digitally. However, there are many ways of publishing graphics so digital images need to be prepared in different ways. The requirements for resolution and overall image quality can differ quite substantially, and images are processed again when plates are made, or when screening is applied to data for output on a digital press. Depending on the image content, operators have to consider what dot shape to use for the screen dots, and whether to use stochastic screening in order to avoid moiré.

Density

For reproduction in a digital workflow, photographic originals, colour negatives and transparencies, have to be digitised using a high end scanner, either drum or flatbed. Desktop flatbed scanners are really only suitable for scanning reflective photos, where the results are not likely to suffer the rigours of subsequent for print. When screening transparencies, it’s important to use a scanner with sufficient resolution to achieve fine detailed and sharp images. Transparencies have a higher density than reflective images.

Digital images

Scanners used to be important for digital image processing, but they are now largely redundant because of the increase use of digital cameras. High-end digital cameras now have enough resolution and image quality to capture images that can be used in a professional prepress workflow. With resolutions of 10MP (mega pixels) or more in the image sensor, even midrange digital cameras produce good enough images for many publishing scenarios. High-end professional’s digital cameras offer even higher image quality, and even surpass what can be achieved when scanning transparencies on a drum scanner. When processing digital photos the challenge is to maintain both shadow details and highlights when processing the raw data from the camera. This ensures that the colour and grey balance are correct and although the camera’s built in software does a decent job for most situations; advanced image processing is often needed to achieve high and consistent image quality. This is especially true for print output. One of the most popular image editing software packages is, of course, Adobe Photoshop, but it takes a long time to learn and master the more advanced functions.

Five major considerations

If every single image has to be analysed and processed manually there are five main areas to consider.

1. decide if the original image has enough resolution for the publishing process to be used, so that all details will appear sharp and correctly rendered.
2. it’s important that the image is rendered with smooth tone transitions, both in the shadow details, in the midtones, and in the highlights.
3. There should be no tendency to banding or loss of fine details.
4. Good overall contrast is key to ensuring that the image has depth, and the colours should be accurate and as bright as possible, rendered with the correct hue.
5. Last but not least; the grey balance needs to be checked. If an image has a colour cast in what should be neutral grey areas (or light and near white areas), the whole image will look strange.

RGB to CMYK

Digital cameras and scanners capture images in RGB, so before converting images into the CMYK colour space for printing, they need to be optimised. On a calibrated monitor a balance in the RGB values, for example a setting of 127 red, 127 green and 127 blue, should produce a mid-grey neutral tone on the monitor, and so in the image.

Compression

Image processing involves many variables. One of the trickiest for many operators is knowing when and how to apply compression: too much compromises image quality, too little means unnecessarily fat files that can slow down production. A popular technology for reducing image file size is JPEG, but although it’s popular, JPEG is actually a lossy compression technology, so JPEG compressed images will always lose some data, and therefore, quality. Advanced digital photographers prefer to use TIFF on their original photos, because it also can compress images but it is not as lossy as JPEG.

For more information on image processing or printing in general please don’t hesitate to contact us at The Printing House (Print Buying Direct)

For those of you who are looking to design their leaflets, brochures, flyers, or appointment cards in Microsoft Word ready for printing, please read on. We have compiled a few items for you to consider before you start the design process.

IMAGES
Microsoft Office applications will send RGB data to the printer, unlike page layout applications that send CMYK data. Images can be in TIFF, EPS or JPEG file formats ( JPEG compression is not recommended). CMYK images, however, will be converted to RGB unless they are in the EPS file format.

BLACK TEXT AND GRAPHICS
Microsoft uses an RGB color model (unlike other graphics applications that use CMYK) and creates black text using equal amounts of red, green and blue. This can be problematic as the saturation of dry ink in a small area can produce a halo. One option is to export the file to PDF and all instances of black will be converted to gray. Make sure the Adobe PDF PostScript printer driver is properly confi gured to use PostScript Gray for text and vector graphics for R=G=B. Consult with us to ensure the best black text and graphics
rendering.

APPROXIMATING PANTONE AND CMYK COLORS
To create a close match to a PANTONE color within Microsoft Office applications:

• go to www.PANTONE.com and select [Support: Color Library Updates] for a close approximation. Download the PDF Color Chart and Value List for your system to obtain the latest 1,089 PANTONE equivalent values.
• Using Photoshop, create a new color with the corresponding CMYK PANTONE values to determine the RGB equivalents. Make sure the Color Setting in Photoshop is set to [sRGB] for the RGB working space and [SWOP CMYK] for the CMYK working space, unless otherwise directed by your print provider.
• Use RGB values from Photoshop to create new color equivalents in MS Office.

GRADIENTS
When printing a Microsoft Office file that contains a gradient fill within non- EPS graphics or vector objects, banding may occur in the printed output. Office does not render gradient fills into PostScript gradients. Instead, Office uses the Microsoft Windows Graphical Device Interface (GDI) to generate halftone steps
that are then sent to the press.

The banding effect may appear more obvious with larger gradients and depend on the percentage of colors used. For the smoothest gradients, you may want to create them in Illustrator CS2 and in the [File] menu select [Save for Microsoft Office]. This gradient.png file can then be placed into the Microsoft Office
document. Also, processing an Office file into a PDF with [Convert Gradients to Smooth Shades] selected in Acrobat Distiller may improve smoothness or reduce banding. Experimentation is recommended.

We hope you find this blog of some use – The Printing House Ltd – (Print Buying Direct)

Call us for more information on 0870 950 8444.

Welcome to part two of our ‘How to design for print blog’ click here for part one- covering some more areas that graphics designers should be aware of. Please be aware that this blog is directed at design for digital printing, and whilst litho (offset) print has similar requirements there are some fundamental differences, so please talk to us first.

SAVING GRAPHICS FILES
While you are working on files, you’ll want to save them in the application’s native file format (i.e., Adobe Illustrator Document). When you are ready to place them in the page layout application, however, you might want to consider the PDF format for the best portability.

SAVING ILLUSTRATOR CS2 FILES

• Use the Save As feature to save files as PDF.
• Consult your print provider to determine if your work should be submitted flattened or with live transparency. By selecting [Acrobat 4 (PDF 1.3)] you will automatically flatten any transparency effects present in the file. Acrobat PDF 1.4 or higher formats will preserve live transparency attributes.
• PDF files can be edited later if the [Preserve Illustrator Editing Capabilities] option is selected.
• The PDF format can often provide better previews (than EPS) when placed in page layout applications.

SAVING FREEHAND MX FILES
Use the Export feature, not Save As, to export files as PDF from Freehand.

• Click the [Setup] button and use those recommendations shown in fi gure 3-13.
• In the [Convert Colors To:] pull down menu, be sure to select [CMYK and RGB]. Freehand will not modify CMYK images or RGB & CMYK native elements (note that it will, however, convert any RGB placed images to CMYK). Choosing [CMYK] will convert all RGB content to CMYK.
• Consult your print provider to determine if your work should be submitted flattened or with live transparency. By selecting [Acrobat 4 (PDF 1.3)] you will automatically flatten any transparency effects present in the file. Acrobat PDF 1.4 or higher formats will preserve live transparency attributes.
• Using a PDF format can provide better previews (than EPS) when placed in page layout applications.

SAVING GRAPHICS OR PAGE LAYOUTS AS EPS FILES
Though the PDF format is preferred, occasionally you may need to save files from Illustrator, Freehand, InDesign or QuarkXPress in the EPS fi le format. When saving graphics or page layouts, the following are recommended:

• Use TIFF 8-bit color preview.
• Do not assign a color space when possible and select [Leave Unchanged] or [As Is].
• Use [Transparency: High Resolution] when fl attening graphics with transparency.
• Embed all or complete fonts.
• Send all image data.
• Include CMYK PostScript in RGB fi les.
• Only use OPI if the printer requests it.
• Use Binary format.
• Use Adobe PostScript Language Level 3

IMAGE CONSIDERATIONS
OPENING IMAGE FILES
Though most images are either acquired through a digital camera or scanner, Photoshop is generally the first step in assigning the color space of an image.
If the Color Settings in Photoshop are set to [Ask When Opening] for Missing Profiles, you may encounter a window asking how to handle the color of an image being opened.

If no embedded profile is detected when the fi le is opened, you may choose one
of the following options:

• Leave as is—will not embed a color profile into the image. However, for operations that require a color space definition, Photoshop will use the RGB or CMYK Working Space defined in the Color Settings preferences (for example, when performing a Mode change between RGB and CMYK).
• Assign Working Space—assign the profile of the Working Space defined in the Color Settings preferences. Select this option when you want to consistently use one working space or if the working space matches the source space of the received file.
• Assign Profile—assign a specific profile if the source color space is known when the image fi le is opened.

Talk to us about which workflow to use. Assigning the right color space from the start will give you a better idea of how the file will look in print. Remember to implement monitor calibration and characterization as guided by your printer (hopefully us).

Things to consider in choosing a source profile:

• If the RGB or CMYK source space of the image is known, you can assign the profile that matches that color space or you can convert to the assigned working space.
• RGB images without the source color space information may require guesswork to determine the most appropriate source color space. sRGB has a smaller gamut but is a universal working space ideal for images coming from digital cameras and the internet (or destined for the internet). Adobe RGB has a wider color gamut and may work best for images that contain vivid colors.
• For unknown CMYK images, SWOP (v2) is recommended for US markets and Fogra or Euroscale for European markets.
• When working with documents that contain images from a variety of sources, discuss with us if one working space should be assigned to all the images or if the original source color spaces should be assigned individually.

If an ICC profile is detected you can either:

• Use the embedded profile. Photoshop will automatically use the embedded profi le when the Color Settings are set to [Preserve] under the Color Management Policies.

• Discard the embedded profile. If the embedded profile is believed to be
• inaccurate, convert to either an assigned profile or to the working space.

SIZE AND SCALE

• All images should be edited, rotated, cropped and sized in an imaging software application such as Adobe Photoshop. Do not re-size, crop, rotate or adjust images in page layout applications, if possible. Place images into the page layout at 100%.

• In order to obtain high-quality output, the recommended image resolution should be 300 dpi at the actual finished size. Scale images with bicubic sampling and crop all images in Photoshop. Do not use page layout applications such as QuarkXPress to make image size adjustments.
• Also note that submitting images with higher than needed resolution adds unnecessary processing time, creates larger files and may degrade image quality.
• For the best print quality, do not include transfer functions or screen angles unless directed to do so by the print provider. If the job requires specific screen angles or transfer functions, make sure to consult with us first.

SAVING IMAGE FILES
EMBEDDING COLOR SPACES
All images have a source color space. Whenever possible discuss with your print provider if you should embed that source color space (such as the camera or scanner profile). This can allow the RIP to perform the color conversion from the assigned color space to the printer’s color space. This workflow
can provide good color matches.

• Embed the correct source color space with each image saved in either TIFF or PS file format. Note that some printers may request images in JPEG format for jobs that are Variable or require faster productivity.

• ICC profi les in TIFF files generally cannot be embedded into the PostScript code on print. They are mainly used for output previews and to convert from one color space to another within applications such as Photoshop and QuarkXPress. The EPS format, however, can embed the color information (CSA) into the PostScript code and then be picked up by the RIP at the printer.

• Some printers opt not to utilize the embedded profi les and may end up stripping them from files. Be sure to talk over the color management settings and strategies with your printer.

SAVING PHOTOSHOP CS2 FILES— PHOTOSHOP EPS FORMAT

• If you want to embed the source color space of an image, use the EPS format.
• Embed both the ICC Color Profile and PostScript Color Management (PSCM) Color Space Array ( CSA) (see figures 3-18 and 3-19).
• Using the EPS format can also preserve colors that may otherwise be converted by an application such as Microsoft PowerPoint. When images are saved as TIFF or JPEG, the color may be converted prematurely in the page layout application. Colors in EPS format are generally preserved.

The CSA remains with the image when the EPS file is placed in the page layout application (or even with applications that are not color managed, such as Microsoft Word). The RIP can then be set to recognize the embedded CSA in the PostScript stream and perform the conversion from that embedded color space to the printer’s final destination color space.

Note:

• Always make your print provider aware that you have embedded color profiles in your files.
• When saving images as TIFF files, embed the ICC Color Profi le, if possible.
• Save the file in TIFF format without LZW compression.
• Check [Embed Color Profile] in the Save As window.

IMAGE COMPRESSION

• It is recommended that you do not use JPEG compression as it may cause unpredictable results.
• If upsampling is required, although this is not recommended, use bicubic.
• Images higher than 450 dpi should be downsampled using bicubic sampling.

Information supplied by The Printing House Ltd & Print Buying Direct, Crewe, Cheshire, UK

More to follow…