Medium For Resin Particles Containing Fluorescent Dye

Abstract

An object of the present invention is to provide a medium which is capable of inhibiting precipitation and/or aggregation of fluorescent dye-containing resin particles and enables to use the fluorescent dye-containing resin particles for staining after a long-term storage without having to perform complicated operations. The present invention provides a medium for storing fluorescent dye-containing resin particles, wherein, in a particle-containing liquid obtained by adding fluorescent dye-containing resin particles to the medium, the rate of change in the backscatter intensity (transmitted light) at the center of the height of the particle-containing liquid left to stand for 24 hours after the addition is not less than −1% based on the particle-containing liquid immediately after the addition.

Dependencies are inferred from the claim text.