有机相脱酸体系对不同老化墨迹的影响

目的 为了评价古籍化学品的综合效果,完善其除纸张性能外的墨迹的评价指标,探究不同有机相脱酸体系对老旧书页墨迹的影响.方法 制备胶印、中性笔墨样和书法用墨样,并对墨样进行人工老化处理.选择氢氧化钡的甲醇溶液(质量浓度为20 g/L)、氢氧化钡的二乙二醇溶液(质量浓度为17 g/L)和碳酸镁的甲醛溶液(质量浓度为10 g/L)分别对老旧书页以及人工老化的墨样进行脱酸处理.通过扫描仪高分辨率扫描墨样进行图像观察,用分光光度计测量墨样色密度,对3种有机相脱酸剂处理后的墨迹效果进行主客观评价.结果 主客观评价结果显示,经氢氧化钡的甲醇溶液处理后的墨样变化轻微;经碳酸镁的甲醛溶液处理后,墨样表面覆有1层碳酸镁颗粒,墨迹颜色明显变浅,墨样色密度显著降低;经氢氧化钡的二乙二醇溶液处理后,墨迹颜色变深,墨样色密度和线宽均有所增加.结论 不同脱酸体系会对老化墨样字迹产生不同程度影响,研究从图文信息质量的角度为古籍脱酸化学品的综合效果与评价提供一定的参考和借鉴.

Effects of Organic Deacidification Systems Different Aging Ink Samples

The work aims to explore the influence of three different organic phase deacidification agents on the inks of aging paper. Offset printing ink samples, neutral ink samples and calligraphy ink samples were prepared and treated manually to achieve accelerated-aging. Deacidification treatments were carried out on aged pages, artificial accelerated aging offset printing ink samples and calligraphy ink samples. After treatment, the optimal deacidification concentrations of the methanol solution of barium hydroxide, diethylene glycol solution of barium hydroxide and formaldehyde solution of magnesium carbonate on the aged paper were 20 g/L, 17 g/L and 10 g/L, respectively. Subjective and objective ink effects of three organic phase deacidification agents were evaluated by high-resolution scanning image observation and color density measurement by spectrophotometer. The evaluation results show that:The ink sample changed slightly after deacidification by barium hydroxide methanol solution. After being treated with magnesium carbonate formaldehyde solution, the ink samples were covered with a layer of magnesium carbonate particles, and the color of the ink became significantly lighter and the color density decreased significantly. The ink color becomes darker and the color density and line width of the ink sample increase after treated with barium hydroxide diethylene glycol deacidification solution. Different deacidification systems have different effects on aging ink samples. This paper provides some references for the comprehensive effect and evaluation of deacidification of ancient books from the perspective of graphic and text information quality.