電子紙、傳統紙與石碳環保紙之閱讀特性差異
中文摘要
近年來數位閱讀與綠能環保是全球的兩大議題，2010年底國際紙漿價格突破金融海嘯前的歷史高點，使用植物纖維製造的紙媒介已不是最符合綠能環保的閱讀媒介。取而代之的是擁有重複使用與零耗能的顯示模式等特性的電子紙成為未來隨身數位閱讀器的新趨勢。另外，石碳環保紙（Rich Mineral Paper）擁有無污染的生產製程與自然分解回收的特性，因此探討這兩種新興且具優勢之閱讀媒介是否合乎傳統紙張印刷之閱讀適性。故本研究之目標為電子紙、石碳環保紙及傳統塗佈紙三種不同媒介的閱讀特性之差異分析。本研究採真實驗研究法（True Experimental Study），主要以參照美國印刷科技協會（Graphic Arts Technical Foundation, GATF）數位測試導表（Digital Test Form 5.0）設計的電子原稿，依據生產廠商出廠所設定之最佳人因設計組合的電子紙與其他兩種閱讀媒介（傳統塗佈紙、石碳環保紙）的閱讀特性（反差、灰度、灰色平衡、色域）做差異比較與分析。 本研究結果顯示，在閱讀特性「反差」之黑、青、洋紅、黃四色色版以傳統塗佈紙反差最大、石碳環保紙次之、電子紙最小，研究中以傳統塗部紙為實驗對照組，其四色色版的反差值接近GRACoL商業式平版印刷規格建議之反差標準值。在閱讀特性「灰度」本次實驗採用相同的東京油墨株式會社SOY-CERVO 環保油墨進行傳統塗佈紙與石碳環保紙的印製，在青墨、洋紅墨、黃墨的灰度表現，傳統塗佈紙比石碳環保紙有較佳的灰度表現，表示青墨、洋紅墨、黃墨在傳統塗佈紙上墨色純度較佳。在閱讀特性「灰色平衡」傳統塗佈紙以C7M4Y4、C30M18Y20、C60M52Y48、C80M74Y72之百分比組合為最佳，石碳環保紙以C7M3Y4、C30M28Y26、C60M58Y52、C80M76Y74之百分比組合為最佳，電子紙以C7M3Y1、C30M18Y16、C60M52Y58、C80M70Y66之百分比組合為最佳。在閱讀特性「色域」經35次ECI2002R測量求其平均值後，以傳統塗佈紙的色域最為寬廣、石碳環保紙次之、電子紙最小。在後續研究建議，藉由反差、灰度與疊印能力的差異，凸顯出石碳環保紙的專用油墨有待開發的空間。在其他發現方面，對於石碳環保紙的紙張機械結構橫向與縱向抗拉伸強度略遜於傳統塗佈紙，造成印刷後表面不平整，建議石碳環保紙製造商針對石碳環保紙的機械結構，可做為未來研發改良的重點方向。
Abstract
In recent years two important global trends have included digital reading and environmentally friendly green energy, while at the end of 2010 global pulp prices rebounded to new historic highs surpassing their pre-global financial crisis levels, such that natural fiber produced papers are no longer the most environmentally friendly green reading media. Arising in their place are the reusable minimal energy waste display methods characteristic of e-paper concomitant with the unfolding trend for digital readers. Additionally, Rich Mineral Paper has the advantage of creating no pollution during its production and enjoying naturally complete biodegradability, so this study will focus on an evaluation of these two emerging trends in reading media to determine their suitability in comparison with the readability associated with traditionally printed paper. This study will conduct a comparative analysis of readability among three different varieties of reading media including e-paper, rich mineral paper and traditional coated paper. This research employs a true experimental study methodology, depending on manufacturing company’s choice of optimal combination of human factor design variables for e-paper readability. A comparative analysis with such reading attributes as contrast, grayness, gray balance and color gamut of the other two reading media (rich mineral paper, traditional coated paper) establishes referential parameters for future readability enhancement efforts by digital publishers and environmentally friendly rich mineral paper manufacturers.