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頁籤選單縮合
題 名 | Expressing the Color of Black Paper by BL[fec8] Value=以BL[fec8]值表示黑紙之顏色 |
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作 者 | 郭蘭生; 許志明; 杜明宏; | 書刊名 | 林產工業 |
卷 期 | 17:1 1998.03[民87.03] |
頁 次 | 頁185-196 |
分類號 | 476.5 |
關鍵詞 | 黑紙CIE L[fec8]a[fec8]b[fec8]; BL[fec8]值; 吸收係數; 散射係數; Black paper; CIE L[fec8]a[fec8]b[fec8]; BL[fec8]value; Absorption coefficient; Scattering coefficient; |
語 文 | 英文(English) |
中文摘要 | 如眾所週知,黑紙之顏色可以CIE L*a*b*、k值(吸收係數)及在可見光範圍內 (400~700nm)之反射率值示之。話雖如此,可是黑紙之顏色卻不能如同白紙之顏色,藉視白度單 一數值表示。本研究提出可直接表示黑紙深黑程度之建議公式BL*=L*+︱a*︱+︱b*︱。利用 此公式所計算出之單一數值BL*數值即可表示任何黑紙之深黑程度(即黑色料對紙漿之染黑 情形)。BL*值與其相對之k值關係也加以探討。明顯地,低BL*值表示黑紙呈深黑狀,即BL* 值可清楚表示黑紙之真正顏色。可是吾人需有色差計或分光光度計方可測出黑紙之CIE L*a*b 值。 |
英文摘要 | As generally known, the color of black paper can be measured by CIE L*a*b* system, k (absorption coefficient) and the reflectance curves in the range of visible wavelengths (400-700nm). However, the blackness of black paper can not be expressing easily in a single value as the whiteness of white paper. In this study, we present a novel equation: BL*=L*+︱a*︱+︱b*︱, to directly assess the darkening effect of black paper. By the use of this simple equation, a single BL* value will serve to give the blackness (extent of darkening effect resulted from black dyestuffs or carbon black on pulps) of any black papers. The relationship between BL* values and the corresponding k values was examined as well. Apparently, a lower BL* value implies a darker black paper. Results presented herein demonstrate that the BL* value can aptly evaluate the genuine color of black papers. However, a colorimeter or spectrophotometer should be available for measuring the CIE L*a*b* of black paper that will apply to calculate the BL* value. |
本系統中英文摘要資訊取自各篇刊載內容。