Table 3 Development of black bean hair coloring gel
From: Alternative application approach on black bean: hair coloring product
Physicochemical properties | Black bean hair coloring gel | ||
|---|---|---|---|
A8 | A10 | A12 | |
Initial | |||
pH | 5.00 ± 0.01 | 5.10 ± 0.01 | 5.00 ± 0.01 |
Viscosity (cps) | 111,333.33 ± 0.02 | 87,366.67 ± 4845.21 | 74,800.00 ± 1200.00 |
L* | 33.76 ± 0.02 | 33.25 ± 0.07 | 33.55 ± 0.02 |
a* | 0.09 ± 0.02 | 0.06 ± 0.00 | 0.07 ± 0.01 |
b* | − 0.38 ± 0.02 | − 0.45 ± 0.01 | − 0.38 ± 0.01 |
h* | 283.31 ± 2.30 | 277.54 ± 0.47 | 279.80 ± 0.23 |
Visual observed color | Brownish red | Brownish red | Brownish red |
Precipitation/separation | None | None | None |
Accelerated stability test | |||
pH | 4.47 ± 0.01 | 4.38 ± 0.00 | 4.43 ± 0.01 |
Viscosity (cps) | 119,666.67 ± 5686.24 | 98,066.67 ± 8533.07 | 83,733.33 ± 4772.14 |
L* | 31.21 ± 0.05 | 30.36 ± 0.01 | 31.31 ± 0.05 |
a* | 0.50 ± 0.06 | 0.09 ± 0.02 | 0.12 ± 0.01 |
b* | − 0.38 ± 0.10 | − 1.36 ± 0.08 | − 0.44 ± 0.77 |
h* | 323.48 ± 4.13 | 273.63 ± 1.06 | 285.14 ± 1.61 |
ΔE | 2.60 ± 0.06 | 2.96 ± 0.03 | 2.25 ± 0.04 |
Visual observed color | Brownish red | Brownish red | Brownish red |
Precipitation/separation | None | None | None |