The ITO powder has a minimum value of a diffused reflection functional logarithm, logf, at a light wavelength of 470 nm or lower, which {TAIL ~ logarithm} is measured on the basis of the following equation, f=2/2Rd=α/S (Rd: a relative reflectance to a standard sample, α: an absorption coefficient, S: a scattering coefficient, formulated for a diffused reflection light, and {HEAD ~ the minimum value} of −0.1 or less 
The ITO powder has a minimum value of a diffused reflection functional logarithm , logf , at a light wavelength of 470 nm or lower , which { TAIL ~ logarithm } is measured on the basis of the following equation , f=2/2Rd = α / S ( Rd : a relative reflectance to a standard sample , α : an absorption coefficient , S : a scattering coefficient , formulated for a diffused reflection light , and { HEAD ~ the minimum value } of −0.1 or less
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