The invention relates to a solid pigment preparation containingA) 5% to 99% by weight of PY 155 andB) 1% to 95% by weight of copolymer containing the following structural units: 1 to 70 mol % of structural unit B1 1 to 70 mol % of structural unit B2 1 to 70 mol % of structural unit B3. In one form the device has a comb-like extent of tines which are of a carrier material that will melt on contact with skin and thereby deposit an agent that is mixed with the carrier. With the reagent and method, erythrocytes are lysed rapidly and classification of leukocytes into five groups is achieved in the same channel. In addition, the fishing tool may include a pen and a needle member that is preferably sized and configured to be used to clean an eye of a fishhook andor detangle knots in a fishing line.