The pen started as a splotch with a cat paw in it, hence the name!
It's a rougher pen
It also can end up being ever so slightly lighter then the color you're using, but it's not too noticeable
The pen's particles will separate a bit if you push down too hard, so be a little careful
About the image below:
- The canvas size was 500 pixels (?) by 700 pixels
-The resolution is 300 dpi
-Pen size is 10