To produce the ink swatch, I simply dip a Q-tip into the ink and spread it on the paper. Usually, I try and go over the swatch twice without redipping the q-tip.
Saturation would be easier to rate if I had some scientific way to measure dye concentration. Sadly, it's just me eyeballing it. So here are some examples from my idea of a super saturated ink to a dull and chalky ink. Of course, I may be mistaking a brilliant hue or tone for the actual dye density, but here are some examples:
Inks, Pens, and Paper dissected here for your surfing pleasure. I'll be adding my PC to Apple Odyssey too, in the hopes of helping others out of the pit of Newb.