Ingles

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the Documentología is Science that it intends study, the modern, public or deprived analysis of Documents, using different methods and techniques, in order to establish its authenticity or falsification, shaping the conclusions at which arrive through a written report denominated Documentológica Skill.

Documentoscopía ordocumentología, is the discipline that takes care of the document examination to effect to consider with respect to its authenticity or to determine the possible alterations that it has been object.

Within the functions of the Questioned Document expert, we can mention the following:

Analysis of paper

The expert analyzes the intrinsic characteristics of elaboration of Paper, its dimensions,size, texture, color, thickness, and the safeties.

The invention of the paper attributes to Tsai-lun of Chinese origin in year 105 d., and it says that in year 751, in the battle of Samarkand, Arab took prisoners to several manufacturers of paper, to those who jealously took the secret to them kept during several centuries, extending this by all the Arab empire, that is to say, Egypt, Morocco andSpain during centuries XI and XII.

It was until at the beginning of the century XIII when the paper was updated by French, that Spain and Italy concerned of, but was Juan Gutemberg, that with the invention of Imprenta gave impulse to the manufacture of the paper.

By virtue of the different ones you graze used in the manufacture of the paper, such as bisulfite, soda, et cetera, this gives to aspecial fluorescence under Lamp us of Wood, better well-known like “black light”, and Microscope allows us to examine the diverse fibers that enter composition of the paper, and to even appreciate the system of manufacture of this.

Analysis of the fiber

This analysis will have to become to the microscope-stere, with the intention of using the smaller possible paper; nevertheless, it cantake place at first as long as there is sufficient paper available; for it exists Chemical formulas that in France denominates them “Norm NF Q 03-001”, that is the one that needs the colorations obtained by the formulas in diverse fibers, being these the calls “Reactive of Herzberg”, “Reagent of Selleger” and “Reagent of Lofton-Merrit”.

Physical examination

The study of the paper turns on thefollowing elements:

Dimensions in millimeters.

Spaced width and of the bordered one it had if it.

External configuration, by means of Fotografía to the reflected light with 15 or 20 increases.

Internal configuration, by means of microphotography by transparency, dunking the paper with tretacloruro of tin.

Shade of the paper and the song.

Thickness of the paper, using thespherometer, the irregularities of the thickness and Pressure of the writing will be able to be put unsecured by this method.

Filigrees water and marks.

Opacity and Transparency is moderate by means of diafanómetro, measuring Light that happens to trasluz.

Fluorescence, examination with lamp of Wood or black light.

Examination of inks

His settles down Color, Tonality, the possible securityink existence and the origin of Reliable .

In the modern world the experience and the scientific researches teach objectively as they are the variations that Scripture can suffer because of the elements used for its preparation. Between these deserves special importance Red, whose utility is to the service of drawn up of the Letters and Drawings on the paper, and that by its resistance andpermanence gives testimony of the writing. In all time, the men have worried to look for the suitable combinations, compositions and mixtures more for their preparation, and at the same time to indicate their colorful ones, intensities, degrees of oxidation, fixation and indelebilidad, et cetera, in order to know with more facility the frauds, corrections, blotches and other anomalies that often...