If you give the printer/publisher the file the request 8" X 11" at 300 DPI they can make the necessary changes to it for press work.
For presses (such as those that print newspapers) that use what is called a "screen" (the matrix of dots that make up a newspaper photo) or "line screen" this is what they need to set up for. The paper I worked at used a 75 line screen or 75 LPI, photoshop's "auto" function under "image size" says the best DPI setting for 75 LPI is 150 DPI (on the "best" setting).
In the long run its a lot of stuff you don't need to know, but there isn't any reason why you shouldn't. But to make your life easier just give them the 8"x11" @ 300 DPI\PPI, that's all they need.
Good luck.
At 04:01 PM 8/24/2003, you wrote:
This inquiry was sent to List HQ who decided the subject merited discussion online as there probably are many members who have a similar question: Here goes:
It is my understanding that Pixels are for viewing and Dots are for printing. Is there any rule of thumb or some ratio that equates Pixels to Dots. For example, if a printer wants a file to print an 8 X 11 image at 300 DPI than how many PPI should the file contain?
from: PhotoForumn List HQ on behalf of the person posing the question.
