Linework is (you guessed it) a tattoo made only with lines/a lining needle. This can range from simple outlines to works which are very developed and ‘shaded’ with lots of little lines in order to create a more dimensional piece. The linework can be delicate or bold depending on preference. This is also the first step to creating more developed works such as full shading or color pieces.
Blackwork (at least my definition of it) is linework with areas of solid black fill. This style can be very pleasing to the eye and is high-impact visually. Clean and clear distinctions are made between varying elements, and the black fill gives a sense of completion and wholeness to the piece.
Pepper shading is a technique that is usually done with black or gray ink. Pepper shading involves shading with a lining needle that is moved quickly to create a series of tiny dots. The dots create great dimension and a cool look similar to dotwork while being a type of shading that is accomplished very quickly due to its nature. Pepper shading can be done heavily or lightly to create a variety of effects; sometimes it is nice to add just a touch to mostly linework pieces to add just a little depth and contrast.
Single Color Additive Linework
Often adding a pop of color via linework accents can look really cool! You can also get the entire tattoo in a single color ink as well, although only richer/darker shades are recommended (yellows, pinks, oranges, and pastels do not hold up well.)