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Upload File Requirement for Flash Design Engine:
Background: Transparent (Or the background color will be printed on shirt)
**Note: Printing Quality is tightly related to your image quality. Only clear image with high resolution will achieve the best quality**
Resolution and dpi
Resolution is the number of pixels horizontally by vertically. "dpi", which stands for dots per inch, is the measure of printing resolution. When you enlarge the image, higher-dpi image will still look fine but the lower-dpi image will look "dirty". So in order to print large size and get a better printing effect, you are suggested to set your image as above 200 dpi. Do it as follows:
If the dpi is less than 200, it will cause worse printing effects as follows:
How to create a new file with a transparent background?
How to turn an existing image into transparent background?