雙色感溫變色油墨適性研究

Study on The Suitability of Two-Color Thermochromic Ink

感溫變色油墨是一種結合感溫變色材料的一種特殊油墨，技術特徵即為溫度感應變化之應用，是一種智慧型材料，於市場上展現高度適用性與延展性。而感溫變色油墨因其特性，具有可逆型及不可逆型，是以微膠囊技術將隱形染料包覆之，其創新產品大多透過印刷與渲染，如食品包裝與服裝，與消費者進行互動性體驗。而市場對於此類產品的吸引力，除提升增添附加價值外，可否作為指示性與實用性作用，是長期以來關注的問題。因此本研究旨在探討感溫變色油墨其顏色與時間、溫度間的變化關係，以顏色漸變過程進行色彩分析研究，並選擇設計上經常使用之象牙卡為樣本，進行加熱實驗，探究其溫度作為指示性設計方向，為油墨特性做學術之補充。實驗限制為雙色感溫變色油墨，並設定探討溫度為31℃及47℃，以兩款不同雙色感溫變色油墨。就實驗數據看來，不同雙色感溫變色油墨，於相同溫度其色差值以47℃變化較大，而相同溫度不同感溫變色油墨，漸變過程差異性不大，以油墨LCH面向來看，紫色31℃顏色視覺效果差異最小，綠色47℃最具衝擊性，適合高度對比設計需求。

Thermochromic ink is a special ink that combines thermochromic materials. Its technical feature is the application of temperature sensing changes. It is a smart material that shows high applicability and ductility in the market. Due to its characteristics, thermochromic inks are reversible and irreversible. They use Microcapsule encapsulated Leuco Dyes. Most of its innovative products provide interactive experiences with consumers through printing and rendering, such as food packaging and clothing. The market's attraction to such products, in addition to enhancing and adding added value, and whether they can serve as an indicative and practical function has long been a concern. Therefore, this study aims to explore the relationship between the color of thermochromic ink and the change of time and temperature, conduct color analysis research based on the color gradient process, and select ivory cards that are often used in design as samples to conduct heating experiments, explore its temperature as an indicative design direction, and provide academic supplements for ink characteristics. The experiment was limited to two-color thermochromic inks, and the research temperature was set at 31°C and 47°C, using two different two-color thermochromic inks. According to the experimental data, the color difference value of different two-color thermochromic inks at the same temperature, the 47°C changes more greatly, while the gradient process of different thermochromic inks with the same temperature sample is not much different. From the perspective of the LCH aspect of the ink, the visual effect difference of the 31°C purple is the smallest, and the green 47°C is the most impactful, which is suitable for high contrast design needs.