An American made set of knives and chisels Ink, water based or oil based is rolled or brushed on the relief parts of the block to obtain an impression. The choice is one of preference. Oil based relief inks that come in cans and tubes are mostly what I use at this time. I keep a minimum palette in stock and mix most colors. I use a white marble ceramic tile for rolling out inks and palette knives for mixing.
Additives are helpful and sometimes essential with oil based inks.
Daniel Smith Miracle Gel keeps paper from sticking to the block and tearing. Cobalt drier forces the drying time of the ink and will make me die younger if inhaled, so I don't inhale it. Burnt plate oil will magically transform etching inks into relief inks. Whiting will stiffen runny inks, and anything else for that matter. I think that's all the goops.