A lessening bleach works by changing double bonds inside the chromophore into solitary bonds. This eliminates the ability from the chromophore to absorb noticeable light.[forty nine] At the conclusion of the nineteenth century, guide white was still the most well-liked pigment; but involving 1916 and 1918, chemical firms in Norway https://www.propanraya.com/warna-putih-untuk-interior-yang-bersih-dan-elegan-pilihan-tepat-dengan-cat-eco-emulsion-ee-4010