Here is a good site that talks about each kind of inkpad
http://<b>http://www.artwithoutanxie...kinfo.html</b>
~~~~ here is some more info from another site.
I had a chart I found a long time ago for each type of ink for what technique but I cannot find it right now.
Types of Ink
Dye-based ink
Dye-based ink is perfect for all kinds of paper. It’s permanent and dries quickly. Most are not waterproof, which means you can’t color stamped images with paint, pens or other water-based mediums as the ink will run together. (But colored pencils are perfect!) Many dye-based inks are acid-free, but do fade with time and especially sunlight. I avoid using them on mulberry paper, since they tend to bleed on very absorbent paper.
Pigment ink
Pigment ink is thicker and richer than dye-based ink; the colors are bright and vibrant and the ink pads are spongy. They’re fade-resistant.
Pigment ink doesn’t soak into paper like a dye-based ink; instead, it dries on top. That means the ink takes a little longer to dry on regular paper—but the color will be more vivid. It also means that pigment ink will not dry on glossy paper. If you want to stamp pigment ink on glossy paper, you must heat-set it with an embossing gun for it to dry.
Because pigment ink stays wet for so long, it’s perfect for heat-embossing!
StazOn
StazOn is the ultimate permanent ink. It can be used on paper—as well as any non-porous surface, like metal, plastic, glossy paper, dominos, transparencies, leather, glass and ceramic. It only takes about 3-5 minutes to dry on a non-porous surface. This is an acid-free, archival, fast-drying solvent ink. My StazOn ink pads are always by my side and I use them all the time!
Embossing ink
These pads come in clear or tinted ink. They’re used to stamp an image before heat-embossing. I like the tinted version for embossing because you can see where you’ve stamped your image! You can also find embossing pens, which make it easy to emboss details of a stamped image, like lights on a Christmas tree.
Distress inks
Distress Inks are some of my all-time favorites for their soft colors and special “alterable” possibilities. They’re different from other ink pads: They stay wet longer than other dye-based ink pads, so you can blend and shadow with water or other inks. Tap some on a paper, then spritz it with water and watch the colors spread. They also work well on photos!