Letters and text in logos, illustrations and similar material should always be converted to "curves".
Be aware of transparency problems in programs like Illustrator, Photoshop, and InDesign.
Images
Images for digital print should have a resolution of 150 ppi when reproduced at a 100 %.
Images for poster print should have a resolution of 100 ppi when reproduced at a 100 %.
Line drawings should have a resolution of 1200 ppi, when the image is reproduced at a 100 %.
An image can be scaled up to a certain degree, albeit not more than + 120 %.
When outlining images, the cutting path must be saved with a flatness of 3 pixels.
Save images as a single EPS or TIF file. EPS files should not be archived with transfer functions.
About JPEG. If JPEG images are opened and archived as JPEG repeatedly, visible quality degradation may occur. High JPEG compression (i.e. more than Medium) may also produce visible quality degradation.
About image formats:
The resolution of a colour or greyscale image must be adapted to the method with which the image is to be reproduced. If the resolution is too low, the image will appear »jagged« and out of focus. If the resolution is too high, the image will take up much space, and printing and handling will take comparatively longer.
Remember:
Final resolution=base resolution divided by size in % times 100. An image with 300 ppi will have a final resolution of 150 ppi if it is scaled to 200 % in a layout program.
