[Dvipng] Higher quality (smooth) PNGs?

[U Avalos]

Hi all. I am creating a hi-quality PDF by using Princexml to convert an HTML 
file (w/ LaTeX fragments) to a PDF. However, while the quality of the LaTex 
fragments created with dvipng look good on the computer screen, they do not 
*print* well. I tried increasing the output resolution (D switch). However, all 
that does is increase the pixel count---the images still appear pixelated and 
not smooth.

Is there a way to make the images more smooth? I tried using the Q switch (-Q 1 
and -Q 10) but that doesn't seem to do anything. I'm using dvipng 1.12.

Perhaps I should be using something else to create the LaTeX images? 

--Uriel