How to check the resolution of file?

The resolution for any artwork should be above 300 dpi (dots per inches). It is a standard requirement used accross industry.

To understand if your file is of a good resolution or not, refer to this detailed article here.

Why is the resolution important?

Any photo or file with lower than ideal resolution. Ideally, images/files for printing should be 300 dpi (dots per inch). PrintStop will not proceed with printing of any image/file below 300 dpi as this is the point where low resolution begins to become noticeable.

P.S: Sometimes image resolution is referred to in terms of ppi (pixels per inch) rather than dpi. In regards to image resolution, the terms dpi and ppi are interchangeable.

Problems caused: Image quality will be less than ideal. Depending on the actual resolution, image quality may range from somewhat poor to extremely poor and jagged edges may be visible throughout the image. Refer the image comparison below.