The quality of the images on your products depends on the quality of the images you upload. Below are some tips and guidelines for ensuring the best print quality for your image.
Formats and Compression
CafePress.com supports two picture file formats:
JPG - JPG's support over 16 million colors, but slightly "distort" the image to compress the file size. For photos, the human eye cannot tell the subtle changes in color, but along straight edges and in pictures with large solid colors, distortion is sometimes apparent.
PNG - Portable Network Graphics format is a completely loss-less compression. Gradients come out much smoother and do not have the distortions that may appear in a JPG. PNG is the recommended file format for image uploads to the CafePress system.
Whichever format you use, save all files in RGB color mode.
Resolution and Sizing
What are Resolution and DPI?
Resolution and DPI are often used interchangeably, but they are quite different. Knowing the difference between them will enable you to get the most from the CafePress services.
Any digital image is composed of pixels. The pixels are the small colored square dots that can sometimes be seen when images are enlarged too much, or if you look at your screen close enough. Resolution is the number of pixels in the horizontal direction by the number of pixels in the vertical direction. For example, a picture with 1200 pixels at the horizontal direction and 2100 pixels at the vertical direction would have a resolution of 1200 x 2100 pixels (pronounced 1200 by 2100 pixels).
As you've probably noticed, nowhere in the above definition it is said what size the pixels are. This is where the DPI comes in. DPI is simply Dots Per Inch. A picture with 100 x 100 resolution would be 1 x 1 inch when printed at 100 DPI, and 100 x 100 inch when printed at 1 DPI!
There's a tradeoff. The bigger the resolution, the bigger the image is. It will take more disk space, occupy more memory when loaded, and will take longer to be transferred through the Web. On the other hand, the bigger the resolution, the better the image looks when printed. We feel it is better to wait a bit more for your photo to upload than to have a bad print at the end.
Upload and File Sizes
If you are receiving a timeout error, check to see how large your file is. Depending on the speed of your internet connection, large files may timeout. Our maximum recommended file size is 7MB. Remember, smaller files means faster upload.
1. - Print the picture yourself on your own printer at the same size you want it to appear on your products. If it looks "chunky" or "dirty" on your printer, it will look "chunky" or "dirty" on your products too.
2. - If you save using JPG format, try using the lowest compression setting possible. Where this setting is located varies with different image software, but they should all have a 1-100 compression factor that you can set. Lower compression means less distortion. If you have the choice of having no compression at all that would be ideal.
3. - On light colored fabrics be aware that any white in your image will show as the color of the fabric. Also very light colors may be affected by the color of the shirt. On dark colored fabrics, white ink will be printed on the shirt. Review more information on designing for dark apparel.
4. - Create images using the Image Guidelines and Product Templates
5. - When creating graphics, try to reduce as much white space around the image as you can. Creating extra white space around the image will prevent the image to print its maximum size.