6-00 (N+) / OYA Permanent Color Natural+ Dark Blond
For use when covering resistant, coarse, gray hair.
Replace the gray covering series -0(N), -01(A), -04(B) in your mixture with the -00(N+) series.
If your target shade is -01(A) or -04(B) mix equal parts target shade with -00(N+) series.
If your target shade is -0(N), replace it with -00(N+) series.
Formulate one level darker.
If no gray covering series are used in the formula, replace up to 50% of your fashion shade with the corresponding -00(N+) shade.
