When I print from Photoshop there are lots of halftones on my film where I do not expect them. The image looks blurry.
There can be a few reasons for Photoshop to print with unexpected results, the first reason is not understanding the proper use of a raster (pixel based) program that softens edges using anti aliasing and the differences between color modes.
The next reason is that Photoshop is printing the file by adding a color profile to the data after the user clicks the print button. In previous versions (CS3 and CS4) the proper setting was called "no color management or separations", in very old versions it was called "same as source" and in CS5 they left with only "separations". All located in either the print window or print preview window depending on the version of Photoshop. You do not want Photoshop to color manage files when outputting data as black film positives (or negatives).
A black and white Channel or spot color Channel file that was created in the RGB or CMYK mode will add extra Channel data making the print appear blurry. Even the print preview will appear blurry.
Users of older versions (CS and earlier) can switch to the grayscale mode to remove extra color data from the channels and or make the proper choice of print settings (color management) from the print or print with preview window in Photoshop.
Choosing "separations" is as good as choosing "no color management" or "same as source". In the new CS5 you must be in the multichannel spot color Channel Mode or CMYK. Choose Multichannel. Consult your Adobe user guide info for more about the Multichannel Mode and its uses.
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