General reference notes about pigments can describe other media (such as oil). They do not verify this product’s exact formulation or behavior.
Quinacridone Violet
- Pigment code
- PV19
- Type
- organic synthetic, quinacridone
- Chemical formula
- C20H12N2O2
- Properties
- Quinacridone Red is a high performance, transparent pigment with an average drying time and uneven dispersal. It is another name for Quinacridone Violet (PV19) and Quinacridone Red (PR192). Quinacridone pigments have relatively low tinting strength in general. For this reason, quinacridone colors are often expensive, because more pigment is required in the formulation.
- Permanence
- Quinacridone Violet has excellent lightfastness and is considered the most lightfast organic pigment in this shade range.
- Description
- Quinacridone Red (PR192), Quinacridone Red (PR19), Gamma Quinacridone (PV19)
Permanent Red
- Pigment code
- PR48:4
- Type
- organic, monoazo
- Chemical name
- beta-oxynaphthoic acid lake, manganese salt
- Properties
- Permanent Red is a common name used for the manganese salt of beta-oxynaphthoic acid (BONA) lake pigment PR:48. It is more blue than other shades of PR:48, with the exception of PR48:2. BONA pigment lakes have high tinting strength.
- Permanence
- Beta-oxynaphthoic acid (BONA) lake pigments are more lightfast than their beta-naphthol counterparts. Although their lightfastness makes them the pigment of choice in many applications, they may shift slightly in color or lose intensity under some conditions. Pigment PR48:4 is considered more lightfast and durable than other PR48 salts.
- History
- Beta-oxynaphthoic acid may have been synthesized as early as 1887. Commerical use of BONA lake pigments began in the 20th century. Pigment PR48:4 is used in packaging and plastics.