: The highest line screen I'm aware of is 300lpi. So, conversely the highest dpi would be 450dpi. However, a 300lpi is very, very rare and most often used for very, very high end printing.

@Murray976

The highest line screen I'm aware of is 300lpi. So, conversely the highest dpi would be 450dpi.

However, a 300lpi is very, very rare and most often used for very, very high end printing. You may find you have difficulty finding a printer who'll use a 300lpi screen for a book. More common line screens are 65, 85, 150 and 175.

And "No" on the black part. dpi/lpi are consistent across all plates. There's no special attention to the black plate. In most cases text, for books, is simply printed 100%k. Avoiding screens on text, especially small text, provides solid text.

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