Like any other marketing or business process, there is jargon and technical speak surrounding print design. Unless you’re a professional in design on print, these terms may be confusing. In this section, we’ll debunk the processes of print design and explain them in a straightforward way.
Raster and vector files
Before we explain print file formats, it’s important to understand what raster files and vector files are and the difference between them:
Raster files are a specific size and resolution from creation because they are made of pixels. As you may have seen when zooming an image on a screen, the downside to a raster file is resolution blurs when you enlarge the image. In other words, raster files are not a satisfactory solution for large print formats. Popular raster file formats include PNG, JPEG, RAW, and TIFF and at least 300 dots per inch (dpi) is necessary for quality print.
Vector files are more flexible because you can enlarge or make them smaller without losing the sharpness and visual quality. File formats like .SVG, .EPS, and .AI are vectors because they geometric shapes, not pixels (dots).
Print files
What file type is in use depends on the media you’re viewing. Photographs are raster files, while graphics and fonts are vector files. Artwork developed by a creator will usually have a combination of raster and vector formats.
This means you have much more flexibility when overseeing your print material. When you commission a print design, the artist builds a source file on an application like InDesign or Adobe Illustrator. These tools allow raster images to be exported, allowing our team to share PDF files with you so you can review and suggest changes.
When the final design is complete to your specifications, the final high-resolution PDF is sent to the printer. Depending on the project parameters, the file may also contain printer marks to separate the design and assist the printing press in successful trimming, colour accuracy, and alignment.
All the following components of the print file are trimmed off on the final print design:
- Crop marks – Lines on the corners that indicate where to trim the design.
- Fold marks – Dotted lines that shows where folds in the print are.
- Bleed – Where the image extends beyond the trim for removal after the print.
Cutter guide – Sometimes regular crop lines are not enough if the file has irregular shapes or design elements. In this instance, the pre-print artwork will include a cutter guide that charts a path around the design to show the printer where to cut.
Colouring
Moving onto colour, the file will be in CMYK colour mode and not Pantone. What’s the difference between these modes? Well, CMYK is the industry standard, although Pantone colours are also common because they give brighter results.
- CMYK – the industry standard for printing colour, CMYK means Cyan, Magenta, Yellow, and Black, which are the four pigments used in modern digital printer technology. These colours combine to create the artwork and other elements of your print design. Some printers may denote CMYK as “four colour” or “process colour.” CMYK colour consistency is dependent on the paper stock and printer hardware.
- Pantone – Also known as Pantone Matching System (PMS), this is a popular colour matching method that is known for delivering more vibrant colour consistency. It uses swatches with numeric value. Pantone is interesting because it can add extra dynamic elements to print design, such as fluorescent and metallic colours. Despite the benefits, it is more expensive than CMYK.