The best image size for screen printing is a document size of at least 10 inches wide at a resolution of at least 300 DPI (dots per inch).
Here's a breakdown of why these specifications are important:
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Document Size: A minimum document size of 10 inches wide provides ample space to work with and ensures that your graphic doesn't become pixelated during the screen printing process.
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Resolution (DPI): 300 DPI is the standard resolution for print. This means there are 300 dots of ink per inch, resulting in a sharp and detailed final print. Lower resolutions can lead to blurry or pixelated results.
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Graphic Size within Document: It's also crucial that the actual graphic you're printing is at least 9 inches wide within the 10-inch document. This gives the printer some leeway for positioning and ensures the design fits well on the screen.
In summary, aim for a minimum document size of 10 inches wide with a 300 DPI resolution, and ensure your graphic is at least 9 inches wide within that document.