An ink set, comprising: a black ink; and a color ink, wherein the ink set is used in an inkjet recording apparatus, comprising: a recording head which comprises a plurality of nozzle arrays, each comprising a plurality of nozzles; and at least one sucking-and-covering unit which covers the recording head and communicates with a suction-generating unit, wherein the black ink is supplied to one of the plurality of the nozzle arrays of the recording head, and the color ink is supplied to the other plurality of the nozzle arrays of the recording head, wherein the black ink comprises: resin-coated carbon-black particles comprising carbon black and a resin existing on a surface of the carbon black; surfactant-treated carbon-black particles comprising carbon black and a surfactant existing on a surface of the carbon black; and water, wherein the color ink comprises: resin-coated color-pigment particles comprising a color pigment and a resin existing on a surface of the color pigment; surfactant-treated color-pigment particles comprising a color pigment and a surfactant existing on a surface of the color pigment; and water, wherein the ink set satisfies Expression, Expression and Expression below: 5.0 % by mass ≤ P Bk ≤ 12.0 % by mass 3.0 % by mass ≤ P CL ≤ 10.0 % by mass R CL / S CL < R Bk / S Bk where, in Expression, P(Bk) represents a carbon black concentration of the black ink; in Expression, P represents a pigment concentration of the color ink; in Expression, R(Bk) represents a mass ratio of the carbon black in the resin-coated carbon-black particles to the carbon black in the black ink, S(Bk) represents a mass ratio of the carbon black in the surfactant-treated carbon-black particles to the carbon black in the black ink, R represents a mass ratio of the color pigment in the resin-coated color-pigment particles to the color pigment in the color ink, and S represents a mass ratio of the color pigment in the surfactant-treated color-pigment particles to the color pigment in the color ink. a black ink; and a color ink, wherein the ink set is used in an inkjet recording apparatus, comprising: a recording head which comprises a plurality of nozzle arrays, each comprising a plurality of nozzles; and at least one sucking-and-covering unit which covers the recording head and communicates with a suction-generating unit, wherein the black ink is supplied to one of the plurality of the nozzle arrays of the recording head, and the color ink is supplied to the other plurality of the nozzle arrays of the recording head, wherein the black ink comprises: resin-coated carbon-black particles comprising carbon black and a resin existing on a surface of the carbon black; surfactant-treated carbon-black particles comprising carbon black and a surfactant existing on a surface of the carbon black; and water, resin-coated carbon-black particles comprising carbon black and a resin existing on a surface of the carbon black; surfactant-treated carbon-black particles comprising carbon black and a surfactant existing on a surface of the carbon black; and water, wherein the color ink comprises: resin-coated color-pigment particles comprising a color pigment and a resin existing on a surface of the color pigment; surfactant-treated color-pigment particles comprising a color pigment and a surfactant existing on a surface of the color pigment; and water, resin-coated color-pigment particles comprising a color pigment and a resin existing on a surface of the color pigment; surfactant-treated color-pigment particles comprising a color pigment and a surfactant existing on a surface of the color pigment; and water, wherein the ink set satisfies Expression, Expression and Expression below: 5.0 % by mass ≤ P Bk ≤ 12.0 % by mass 3.0 % by mass ≤ P CL ≤ 10.0 % by mass R CL / S CL < R Bk / S Bk where, in Expression, P(Bk) represents a carbon black concentration of the black ink; in Expression, P represents a pigment concentration of the color ink; in Expression, R(Bk) represents a mass ratio of the carbon black in the resin-coated carbon-black particles to the carbon black in the black ink, S(Bk) represents a mass ratio of the carbon black in the surfactant-treated carbon-black particles to the carbon black in the black ink, R represents a mass ratio of the color pigment in the resin-coated color-pigment particles to the color pigment in the color ink, and S represents a mass ratio of the color pigment in the surfactant-treated color-pigment particles to the color pigment in the color ink.