| 摘要 |
PROBLEM TO BE SOLVED: To provide colored particles capable of contributing to the improvement of visual inspection judgement and detection sensitivity in an immuno-chromatography, and in which the content of dye is higher than the conventional one, and a method for producing the same.SOLUTION: Provided is colored particles made of polymer particles including colored particle dye in which the content of the dye is 0.05 g or higher per g of the colored particles, and also provided is a method for producing the colored particles, where a dye liquid obtained by dissolving or dispersing dye insoluble in water and also soluble in an oily organic solvent into an aqueous medium to prepare a dye emulsion; and a step (B) where the dye emulsion and the polymer particles are mixed to dye the polymer particles. In the step (A), the dye is used at an amount of 80% or higher of a saturated solubility to the oily organic solvent of the dye.SELECTED DRAWING: None |
