为研究可擦笔书写字迹消退后的光学显现方法及效果比较，本文采用紫外反射和光致发光两种成像方法，对擦笔书写2小时、12小时、24小时后采用摩擦法消退的字迹以及可擦笔书写48小时、72小时后采用加热法消退的字迹进行检测。紫外反射和光致发光两种成像方法均可显现可擦笔的消退字迹，紫外反射的显现效果优于光致发光，短波紫外反射的显现效果优于长波紫外反射，紫外反射成像方法显现可擦笔消退字迹的有效检测率为90%，消退字迹呈深色字迹浅色背景；光致发光成像方法显现可擦笔消退字迹的有效检测率为70%，消退字迹呈浅色字迹深色背景。书写时间和消退方法对字迹显现效果影响不大。
To study the optical visualization method and effect comparison of erasable pen writing after fading, ultraviolet reflection and photoluminescence imaging methods were used in this paper for detecting the erasable pen writing 2 hours, 12 hours, 24 hours after the use of friction faded handwriting and the erasable pen writing 48 hours, 72 hours after the use of heating faded handwriting. Both ultraviolet reflection and photoluminescence imaging methods can reveal the faded handwriting of the erasable pen. The effect of ultraviolet reflection is better than that of photoluminescence. The effect of short-wave ultraviolet reflection is better than long-wave ultraviolet reflection. The effective detection rate of erasable faded handwriting by ultraviolet reflective was 90%, and the faded handwriting showed dark color and light background. The effective detection rate of erasable faded handwriting by photoluminescence imaging was 70%, and the faded handwriting showed light color and dark background. Writing time and fading method have little influence on the effect of handwriting reveal.
