Gromwell Root P.E GMP manufacturer moq :1kg payment:TT ,L/C Gromwell Pigment is obtained through an extraction, refining processes from high quality Gromwell root which cultivated in the northwest of China. It is a red purple resinoid liquid. It dissolves in oil and alkaline solution. Its color is affected by various pH values: red in acid, red purple in neutral, blue in alkaline. It has ...
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