The phrase "natural colouring" is correct and can be used in written English.
It is typically used to describe substances that are used to add color to food, cosmetics, or other products and are derived from natural sources such as plants or minerals. Example: The ice cream company prides itself on using only natural colouring in its products, avoiding artificial dyes and additives.
The problem with beige and nude is that they encompass so many tones and shades, and they can either flatter or drain your natural colouring.
The Ming ivory carvings that have survived are mostly handsomely carved figures, not stained or painted but having the natural colouring of ivory.
He's heard stories from his subjects of the bullying they have suffered, of their attempts to render themselves un-ginger (as Knights himself did – he dyed his hair for 10 years before resigning himself to his natural colouring).
Or it may be natural, as when litmus a natural colouring matter from lichens is used as an acid-alkali indicator because it turns red in acid solutions and blue in alkaline solutions.
Conventional preparation of cotton-based textiles usually involves desizing of the starch (size) applied to the yarn during weaving, scouring of the material to remove the natural hydrophobic impurities such as fats and waxes, followed by a bleaching process to impart whiteness by destroying the natural colouring matter [1, 2, 3].
It has become commercially valuable again, although most consumers are unaware that the phrases "cochineal extract", "carmine", "crimson lake", "natural red 4", "C.I. 75470", "E120", or even "natural colouring" refer to a dye derived from an insect.
Fluorescent lights provide even illumination but may overilluminate the tank walls; coloured lights accentuate natural colours; and mercury-vapour lamps encourage maximum growth of marine plants.
This approach combines the perceptual information of three natures – colour, texture, and homogeneity – in order to segment natural colour images.
Hair dyed natural colours is also allowed.
This young lady offers bold versus natural colour.
Tiled floors, natural colours on the walls, ancient villages on those Luberon Mountains.
