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A color material that can fix a color onto natural or synthetic fibers or other objects is called dye. Most of vegetable dies applied to natural dye materials use leaves, stem, fruit and flower, heartwood, and bark The original color of sap extracted from plants is not used as it is, but each unique pigment enables color fixing. Even though dyes are from the plants of a kind, the color varies to growth environment, growth time, part of the plant, and season. This is a demerit for the reproducibility of color, and is a merit in that basic color can be varied more variously by use of mordant even in the same salt solutions. Polarization microscope was used to measure the thickness of hair. And, tensile strength by KS K 0409, wash off fastness by KS K0403, complex fastness to sweat and sunglight by KS K 0701, and color by L*a*b color space method were mured. On the whole, control plant colored hairs had lower values in tensile strength but higher values in thickness, wash off fastness, complex(sweat plus sunlight) fastness, and color degree. From the experiment results, hair quality of primitive hairs bossed the condition and reaction of secondary hairs. Different hair thickness measurement proved this, which suggested that various hair measurement of the primitive hairs were different was proved. Plant dye materials in the realm of nature increase hair thickness when coloring, or contracts once-swelled hairs by permanent or coloring, depending on dyes