20 августа, 2015 
Pokraskin Bismuth vanadate pigments are characterized by brilliant, greenish-yellow to reddish-yellow shades of high color strength, high gloss and good hiding power. When they are compared with other inorganic yellow pigments, their coloristic properties are seen to resemble those of cadmium yellow and lead chromate. Figure 2.1 shows the reflectance curves ofbismuth vanadate and other inorganic yellow pigments.
 |
 |
 |
 |
 |
|||
 |
|||
Reflectance[%]
Bismuth vanadate pigments have a much higher chroma than yellow iron oxide and nickel titanate pigments. In full shades and the palest tints, bismuth vanadate pigments show superlative fastness to weathering.
Unstabilized types tend to undergo substantial reversible color changes (photo — chromism) on exposure to intense radiation in the Suntest. Following additional stabilization, this effect is substantially reduced or becomes barely perceptible.
2.4.4
Опубликовано в рубрике 