Our favorite image mode is a .tiff. Or send us vector art images (made in Illustrator or Freehand) instead of raster images (made in Photoshop). Jpeg files will create low-quality letterpress plates that will make you unhappy; its file format is best intended for the web.  Files that end in .bmp can also give unwanted results by saving as the wrong size and are also lower quality.

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Posted in: Designing for Letterpress, File Preparation, File Preparation