论文部分内容阅读
最近我们到基层供销社查帐,发现有的单位1970年以前的帐册、记帐凭证的字迹已模糊不清,有的甚至消失.由于普通纯蓝墨水是用染料配制而成,容易被水和酒精溶解,也不耐日晒,字迹不能长久保存.蓝黑墨水是鞣酸和硫酸合成的鞣酸亚铁溶液,这种溶液能够渗入纸张和其他纤维组织内部,经氧化变成黑色沉淀物.显现出书写的文字、它能够长期保存,一般不会褪色,但是,如果用“高效褪色剂”也会迅速褪色.为了避免上述问题,建议财会工作人员使用上海214型碳素墨水.
Recently, we went to the grass-roots supply and marketing cooperatives to check and found that some units before 1970 books and vouchers written illegible, and some even disappear.As the ordinary pure blue ink is formulated with dyes, easy to water And alcohol dissolved, nor resistant to the sun, the writing can not be preserved for a long time. Blue and black ink is tannic acid and sulfuric acid synthesis of tannic acid solution, this solution can penetrate into the paper and other fibrous tissue, the oxidation into a black precipitate It shows written text that can be stored for long periods of time and generally does not fade, but fade quickly if used with “Highly Effective Fade.” To avoid this, it is advisable for accounting staff to use Shanghai Type 214 carbon ink.