Abstract: Provided is a test chip capable of significantly suppressing unevenness in the color development. The test chip includes a sheet shape and includes a first layer on a front side and a second layer on a back side, wherein the first layer and the second layer are located adjacent to each other. One of the first layer and the second layer has a liquid receiving section A. The first layer has at least a detection confirmation section B. The second layer has at least a liquid flow section D adjacent to the detection confirmation section B and a liquid passage E connected to the liquid flow section D.

Abstract: Provided are resin particles, including: a vinyl polymer containing divinyl benzene as a constituent, wherein a number average particle diameter of the resin particles is 2.5 micrometers or greater but 10.0 micrometers or less, wherein a coefficient of variation (CV value) of a number-based particle diameter of the resin particles is 20% or lower, and wherein a circularity of the resin particles is 0.990 or greater.