Home made PCB etching problem
I've had the same problem in the past, here's what I did to fix it:


You have some fuzzy lines, probably because the mask isn't close the board in some places. Wedge your board and mask between two glass plates and clip them together with office clips.
Your board looks a bit under exposed, in my case I had to double the exposure time.
The longer the acid takes the more distortion your tracks incur. Try using the Hydrochloric &amp; Peroxide mix. A 50/50 mix gave me an etching time of a minute.