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Table 2 Development of base hair coloring gel

From: Alternative application approach on black bean: hair coloring product

Ingredients (% w/w)Formula
ABC
DI water
Ethanol66.3266.3266.32
Propylene glycol
Vitamin E acetate0.040.040.04
Disodium EDTA
Purple spirit1.041.041.04
Triethanolamine
Carbomer0.500.500.50
Xanthan gum0.30
HEC0.30
HPMC0.30
Phenoxyethanol/ethylhexylglycerin1.001.001.00
Initial
 pH4.97 ± 0.024.97 ± 0.014.97 ± 0.02
 Viscosity (cps)123,000.00 ± 13,228.76304,333.33 ± 12,423.10410,666.67 ± 30,022.21
 L*37.24 ± 0.0135.76 ± 0.0134.71 ± 0.01
 a*− 0.10 ± 0.010.06 ± 0.020.04 ± 0.01
 b*0.42 ± 0.01− 0.47 ± 0.01− 0.28 ± 0.01
 h*103.36 ± 1.03276.98 ± 2.15277.45 ± 0.15
 Visual observed colorClear light yellow gelOpaque colorless gelOpaque colorless gel
 Precipitation/separationNoneNoneNone
Accelerated stability test
 pH4.87 ± 0.014.84 ± 0.014.80 ± 0.03
 Viscosity (cps)357,333.00 ± 17,243.00584,333.00 ± 16,258.00575,000.00 ± 9643.00
 L*33.25 ± 0.0231.96 ± 0.0231.59 ± 0.28
 a*− 0.02 ± 0.03− 0.03 ± 0.06− 1.08 ± 0.52
 b*0.37 ± 0.01− 0.51 ± 0.01− 0.54 ± 0.42
 h*92.78 ± 3.83266.41 ± 6.34203.61 ± 13.24
 ΔE3.99 ± 0.033.81 ± 0.023.36 ± 0.42
 Visual observed colorClear light yellow gelOpaque colorless gelOpaque colorless gel
 Precipitation/separationNoneNoneNone