A lessening bleach functions by converting double bonds in the chromophore into one bonds. This eradicates the flexibility of the chromophore to soak up seen mild.[49] At the end 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