When uploading a print file to the Two Fifteen website we recommend uploading a PNG file at 300 dpi. The website will give your uploaded image a quality score measured in PPI. The closer the image score is to 300 the better the finished print.
What does PPI mean?
Image resolution is typically described in PPI, which refers to how many pixels are displayed per inch of an image.
Higher resolutions mean that there more pixels per inch (PPI), resulting in more pixel information and creating a high-quality, crisp image.
Images with lower resolutions have fewer pixels, and if those few pixels are too large (usually when an image is stretched), they can become visible like the image below.
When uploading an image we want the quality score to be as close to 300 PPI as possible.
To achieve this in our photo editing software such as photoshop we would set our page size at 320 x 500 mm and the DPI at 300. Now when we save our png image we know the PPI will be 300.