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Checking the resolution of your images

When using images in your artwork, you should do so carefully. Just because the images in the artwork look good on the monitor, it does not necessarily mean they will look good on the final printed product. Please note, that all images should be in CMYK colour mode and not in RGB colour mode.

Images can be basically one of two types: bitmap images and vector images. Bitmap images are stored as a series of tiny dots called pixels. These pixels are arranged together in a pattern to form an image. When you zoom into the image you will eventually start seeing the individual pixels that make up the image. In comparison, vector images are not based on pixels, but on mathematical formulas that draw certain lines and curves. When you zoom into a vector image, it is just as sharp as the image in original size.

To ensure the sharpness of bitmap images you should check the resolution (DPI) of the bitmap images in the artwork. DPI measures the amount of pixels per inch.

For printing, please ensure that your bitmap images have a resolution of at least 300 DPI to ensure an optimal printed result.

You can verify the resolution of the bitmap images in your artwork as follows. Open the artwork in Adobe Illustrator and go to Window → Document Info.

To verify the resolution of images, go to Document Infor

This opens a window where you can check the information of the document in detail. Please click on the More Options button on the top right of the window, and select the Embedded Images option.

Select Embedded Images under the More Options button

Then, select the image you would like to check. The Document Info window will then show the resolution of the image under Resolution.

Select the image that you would like to check, and check if the resolution is 300 or more

Select the relevant image and check the resolution is 300 DPI or more. If the resolution is lower than that, the image might look pixelated on the printed product.

Please note that there is no way to turn a low-resolution image into a high-resolution image. You need to acquire the bitmap image in a higher resolution and replace it in the artwork.