被消褪变造的文件材料有纸张的、塑料的和金属的,消褪各种材料字迹的方法既有传统的也有新的,随着现代科学技术的发展,作案人的变造手段也在不断变化。当前在文检工作中,要研究新的案情变化,发明新的显出技术,揭露消褪变造事实,从而为侦破案件提供线索和证据。 Faded documents made of paper, plastic and metal, fading various materials, both traditional and new methods, with the development of modern science and technology, the modus operandi of perpetrators also keep changing. At present, in literary inspection work, we must study new changes in the merits, invent new display technologies, and expose the facts of fading and transformation so as to provide clues and evidences for the detection of cases.