Quiz on Specialty Pigments

What type of pigments are primarily used in magnetic information storage systems?

• Iron oxide pigments

• Transparent pigments

• Anticorrosive pigments

• Luster pigments

Which of the following is a property of chromium dioxide (CrO2) as a magnetic pigment?

• High electrical conductivity

• Low crystal hardness

• Low saturation magnetization

• High coercive field strength

What is the main advantage of cobalt-containing iron oxide pigments?

• Lower production cost

• Higher coercivity

• Better color stability

• Increased transparency

Which method is NOT mentioned for producing barium ferrite pigments?

• Electrochemical method

• Ceramic method

• Glass crystallization method

• Hydrothermal method

What is the primary function of anticorrosive pigments in coatings?

• To enhance color vibrancy

• To protect metal surfaces from corrosion

• To provide thermal insulation

• To improve adhesion to substrates

What is the LD50 value for Zinc phosphate according to the toxicological data?

• > 5000 mg/kg

• > 21,500 mg/kg

• > 640 mg/kg

• > 11,800 mg/kg

Which of the following pigments is classified as a carcinogenic substance?

• Zinc oxide

• Barium metaborate

• Zinc potassium chromate

• Zinc phosphate

What is the primary use of nacreous pigments?

• To act as a UV filter

• To provide opacity in coatings

• To achieve lustrous and iridescent color effects

• To enhance corrosion resistance

Which company is known for producing Bismuth oxychloride?

• J. Jaeger GmbH

• Merck KGaA

• BASF

• Engelhard Corp./Mearl

What is the main advantage of using titanium dioxide-mica pigments?

• Low cost and high toxicity

• High luster and good hiding power

• High density and low stability

• Limited applications in cosmetics