Do I need to "resample" or "interpolate" my images up to 300 DPI for Code Ice to print them?

This is a misleading concept that some image editing programs make rather confusing. Although your image editing software may report 72, 240 dpi (or any other number) for a particular image in actual fact digital images simply have no DPI, because images (by themselves) have no relation whatsoever to "inches".

Relating images from scanners or digital cameras to a physical print size as image editing applications often do, is simply confusing and a rather useless concept since they do so without consideration of what size you actually intend to print the photo in the first place! In other words, reporting 72 DPI for a 2048 x 1536 resolution image is simply choosing a "default" print size of 28.44 inches by 21.33 inches for absolutely no reason, because editing a photo should not necessarily be linked with a specific print size.

Let Code Ice deal with print size and interpolation when we come to print your work

Stored images such as JPG, TIF and other formats simply have a "resolution" which denotes the number of pixels in an image. Obviously, you cannot translate image resolution such as 2048 x 1536 into dots per inch (DPI) until you select a print size for that image. For example, if we print that 2048 x 1536 image at a width of 10 inches, you will get a print that is approximately 200 DPI (2048 pixels divided by 10 inches). Conversely, if you print the same image at 14 inches wide, you'll get a print that is about 150 dpi. The RIP software used by Code Ice is designed to print images at whatever size you specify and will ensure that your images are always printed at optimal resolution.

When you discuss your work with us a primary consideration will be whether your image files contain enough pixels for a given print size i.e. file size.