Global Reversible Thermochromic Materials Market By Type (Impact Modifiers Modified Nylon 6/6, Fibers Modified Nylon 6/6, Internal Lubricants Modified Nylon 6/6, and Fillers Modified Nylon 6/6), By Application (Thermometers, Food Quality Indicators, Papers, and Pigments; Inks and Paints), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028