Söz Uçar Yazı Kalır ya Yazı Uçarsa Kaybolan Mürekkep ile Oluşturulmuş Belgelerin İncelenmesi Bir Olgu Sunumu

Abstract

ÖZETK a y b o l a n m ü r e k k e p s u b a z l ı b i r a s i t b a z indikatörüdür. Havaya maruz kaldıktan belirli bir zaman sonra rengi kaybolarak renksiz bir hal alır. Daha çok şaka malzemesi olarak kullanılmakla birlikte sahtecilik amacıyla da kötüye kullanılmaktadır. Bu çalışmada kaybolan mürekkeple oluşturulmuş bir senedin adli belge inceleme laboratuvarında incelenmesi sonucu tespit edilen bulgular sunulmuştur. Kaybolan mürekkeple oluşturulan belgelerin inceleme yöntemleri, bulgular ve literatür eşliğinde tartışılmıştır.Anahtar kelimeler: Adli belge inceleme, sahtecilik, kaybolan mürekkep, imza incelemesi ABSTRACTDisappearing ink are water-based acid-base indicators. It's change from a coloured to a colourless solution upon exposure to the air. Although disappearing inks are mostly used joke tool, these inks are abused in forgery. A bond that generated using disappearing ink was presented in this study. This document was examined use VSC 6000/HS in Questioned Document Examination Laboratory.

Prepared Disappearing Ink and Deciphering of Documents

“…Since the writings created through by such inks disappear shortly after being exposed to air, they can be used as novelty materials by children for jokes, surprises, curiosity, etc. . In recent years, it seems that these inks have begun to be used in legal documents, and they cause victimization of third parties since there is no physical or chemical sign of deletion on such documents .…”

“…. In recent years, it seems that these inks have begun to be used in legal documents, and they cause victimization of third parties since there is no physical or chemical sign of deletion on such documents . For example, a forgery committed by signing a promissory note with regular ink and filling in the important sections, that is, amount, with disappearing ink is quite common.…”

“…For example, a forgery committed by signing a promissory note with regular ink and filling in the important sections, that is, amount, with disappearing ink is quite common. After the ink from the amount section disappears, a different amount can be written with a fountain pen filled with regular ink, causing the fraud .…”

“…After their solutions are prepared, thymolphthalein generates a blue color, phenolphthalein generates a red color, and their mixture generates a purple solution according to their pH values . Thymolphthalein (2′,2″‐dimethyl‐5,5‐di‐iso‐propylphenolphthalein) is frequently preferred since the use of blue ink is common in daily life . The fading period of disappearing inks without leaving any visible trace on the paper surface ranges from a couple of hours to several days depending on the amount of thymolphthalein and sodium hydroxide in the solution .…”

“…The fading period of disappearing inks without leaving any visible trace on the paper surface ranges from a couple of hours to several days depending on the amount of thymolphthalein and sodium hydroxide in the solution . These disappearing inks on documents may not appear, even under high‐resolution magnifiers, ultraviolet (UV), and infrared (IR) light .…”