Global Optical Variable Pigments Market By Type (Holographic Hot Stamping Foil, Holographic Narrow-Web Cold Foil, Holographic Sheet-fed Offset Cold Foil, and Holographic Lamination Foil), By Application (Inks, Coatings, and Plastic), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028