著色劑 angolul

colourant [colourants]▼(a pigment, dye etc added to something to change its colour or hue)
noun
[UK: ˈkʌ.lə.rənt] [US: ˈkʌ.lə.rənt]

pigment [pigments]▼(dry colorant)
noun
[UK: ˈpɪɡ.mənt] [US: ˈpɪɡ.mənt]