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Raster vs Vector Files for Printing

“Can you please send a copy of your logo in vector file format?”

Hands up if you don’t even know what this question means. What is a vector file? In this article, we are going to discuss the difference between raster images and vector images.

Raster Images

First, let’s talk about raster images. Raster images are created by a dot matrix. In other words, tiny dots are used to compose an overall image. Raster images are usually saved in more familiar formats like .jpg, .jpeg, .bmp and .png. You can typically see this dot matrix when you zoom into an image.

Raster images can be problematic in printing if the design needs to be modified. Raster images don’t allow for easy manipulation or change. This is where vector images come in handy.

Vector Images

Vector images use mathematical statements to represent shapes. These shapes can be given attributes such as thickness, curvature and colour. Examples of vector image file types are .ai, .eps, .pdf and .svg. Because of their mathematical nature, vector images have the capability of redrawing itself when scaled. This is how vector images retain smooth and crisp resolution even at a smaller file size.

Other than being able to retain high resolution, vector image files also allow for easy manipulation such as:

  • Moving, adding and/or removing objects (like text)
  • Transforming and resizing
  • Changing attributes (such as colour and thickness)

Vector files can even be exported into raster formats at a desired resolution.

Raster images are still very important. Our photographs, for example, are raster images. Raster images are also used as a final check in print proofs. We can make sure that all the fonts and colours are coming out correctly.

Remember that it is always advantageous to have your design in both raster and vector file formats. Next time you are working with a graphics designer, make sure that you obtain a copy of your design in both formats.

The video below provides a visual demonstration of the differences between a raster image and vector image.

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Regards,
Papa Elf