pressure-responsive base particles; and

silica particles,

wherein the pressure-responsive base particles contain a styrene-based resin that contains styrene and other vinyl monomers as polymerization components and a (meth)acrylic acid ester-based resin that contains at least two (meth)acrylic acid esters as the polymerization components and in which a ratio of a mass of the (meth)acrylic acid esters to a total mass of polymerization components is 90% by mass or more,

the pressure-responsive particles have at least two glass transition temperatures,

a difference between a lowest glass transition temperature and a highest glass transition temperature is 30° C. or higher, and

a ratio of a surface coating rate Cs2 by the silica particles after application of the following first stress to a surface coating rate Cs1 by the silica particles before application of stress satisfies a relationship of 0.4≤ Cs2/Cs1≤0.8,

first stress: 10 g of the pressure-responsive particles and 90 g of resin-coated ferrite particles are put in a V-shaped mixer with a rotary container having a volume of 0.5 L and rotated at a rotation speed of 40 rpm for 20 minutes at a temperature of 20° C. and a relative humidity of 50%,

wherein the at least two kinds of (meth)acrylic acid esters are selected from the group consisting of a 2-ethylhexyl acrylate, a hexyl acrylate and a n-butyl acrylate,

wherein a mass ratio between two (meth)acrylic acid esters having the highest mass proportion among the at least two (meth)acrylic acid esters contained in the (meth)acrylic acid ester-based resin as the polymerization components is 80:20 to 20:80.