For a touch of color behind a bead, set aside a small area on the NF6 before applying the dubbing. Keep the fibers set back so that the pink ring remains clearly visible. If you’re tying a fluorescent abdomen, start by creating an even base and minimize the number of thread wraps. The length of the colored section is enough to vary the contrast without making the fly unnecessarily thick. NF6 is sold in 100-meter spools.