When we refer to high-res or high-resolution images, we're talking about the amount of detail inside an image. Every printed image contains a certain amount of dots. For example, the image resolution needed for printing is 300 dpi (dots per inch). So in one square inch of a printed image, there are 300 ink dots inside.
But DPI is different to PPI (pixels). PPI relates to the number of pixels within one square inch of an image displayed on a computer monitor, not in print.
We always recommend printing images and art files at 300 dpi. This setting will ensure your finished prints look as crisp and clear as possible. You can upload your image files in several formats, including JPEG, PNG, and PDF. You can also print at a higher resolution, but it will only improve the image quality to a certain point. So anything above 400 dpi will only slow down the upload process without adding any visual benefit.
We know that everyone may not have access to images that are 300 dpi, but our system can still process them.
If you only have access to images between 100 and 300 dpi, they are still suitable for print. They might look less sharp than a higher-resolution image, but a lower resolution may not be immediately noticeable.
Do not print anything that falls under 100 dpi. Your final prints may look blurry and pixelated, and you can get better results with higher-resolution images instead.
Most web images are only 72 dpi, and his image type is not usually problematic. Low-resolution images have small file sizes and don't look blurred on your computer screen. But as a general rule, images taken from the web will not look good in print.
Once you have uploaded your files, our system will highlight any resolution issues so you can see and adjust them yourself. Once you've made the necessary changes and thoroughly proofed your files, you can confirm your order and send your files to the printers.
If you have an image under 100 dpi, it might be tempting to open it in Adobe Photoshop and manually increase the resolution settings. But adjusting these settings won’t increase the resolution. It will just increase the size of the pixels themselves. This process is called upsampling, and you should avoid this for printing.
If you print an upsampled image, like this image resolution example here, it will still look pixelated on the page. To learn more about increasing image resolution, check out the guide here.
Generally, the best solution is to find an image with a high resolution so you can avoid compromising the quality and aesthetics of your prints.