InDesign's Rich Black: What values are used and Appearance of Black preferences setting?

Written by Jay Gelnett on November 22, 2010

I found a preference for Rich Black in InDesign. Previously I always created my own Rich Black swatch in Quark and InDesign at 70, 70, 70, 100. I noticed the Rich Black preference and I recently changed the Printing/Export option for Rich Black to output all Blacks accurately. The reason I did this is because I assumed the default setting (Output All Blacks as Rich Black) would explain why small type I created in PS to be only 100k black (zero for other 3 color values) turned out to be Rich Black upon export and printing and made the small text a little blurry. Is this a bad/dangerous thing to do?