Documents And Their Scientific Examination : With Especial Reference to the Chemistry Involved in Cases of Suspected Forgery, Investigation of Disputed Documents, Handwriting, Etc.
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In our eReader you can find the full English version of the book. Read Documents And Their Scientific Examination : With Especial Reference to the Chemistry Involved in Cases of Suspected Forgery, Investigation of Disputed Documents, Handwriting, Etc. Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Documents And Their Scientific Examination : With Especial Reference to the Chemistry Involved in Cases of Suspected Forgery, Investigation of Disputed Documents, Handwriting, Etc.
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' Zeitsch. anal. Chem., 1901, xl., 725.
' Comptes rend., Ixxviii., p. 1213.
70 DOCUMENTS, AND THEIR SCIENTIFIC EXAMINATION.
results obtained by copying methods should only be accepted with great caution. If, however, there is a pronounced difference between the copying capacity of two parts of the same document, while chemical tests indicate that the inks are of the same type, and the writing is of equal intensity, it is extremely probable that the writing was not done at the same time. More de...finite conclusions, however, can be drawn if the ink is supposed to be an ancient one, and yet gives a sharp copy.
Chemical Tests for Age. — Iron-gall ink which has recently been applied to the paper reacts rapidly with various reagents, but, after the lapse of a year or so, will only react slowly, and finally, after a period of ,six to ten years, will remain unaffected for a long time. This difference was first noted by Sonnenschein,i and was subsequently recommended by Irvine.^ Various reagents have been suggested for the purpose, such as dilute hydrochloric acid, bromine water, hypo- chlorous acid, oxalic acid, etc.
What to read after Documents And Their Scientific Examination : With Especial Reference to the Chemistry Involved in Cases of Suspected Forgery, Investigation of Disputed Documents, Handwriting, Etc.?
You can find similar books in the "Read Also" column, or choose other free books by C Ainsworth Charles Ainsworth Mitchell to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
' Zeitsch. anal. Chem., 1901, xl., 725.
' Comptes rend., Ixxviii., p. 1213.
70 DOCUMENTS, AND THEIR SCIENTIFIC EXAMINATION.
results obtained by copying methods should only be accepted with great caution. If, however, there is a pronounced difference between the copying capacity of two parts of the same document, while chemical tests indicate that the inks are of the same type, and the writing is of equal intensity, it is extremely probable that the writing was not done at the same time. More de...finite conclusions, however, can be drawn if the ink is supposed to be an ancient one, and yet gives a sharp copy.
Chemical Tests for Age. — Iron-gall ink which has recently been applied to the paper reacts rapidly with various reagents, but, after the lapse of a year or so, will only react slowly, and finally, after a period of ,six to ten years, will remain unaffected for a long time. This difference was first noted by Sonnenschein,i and was subsequently recommended by Irvine.^ Various reagents have been suggested for the purpose, such as dilute hydrochloric acid, bromine water, hypo- chlorous acid, oxalic acid, etc.
What to read after Documents And Their Scientific Examination : With Especial Reference to the Chemistry Involved in Cases of Suspected Forgery, Investigation of Disputed Documents, Handwriting, Etc.?
You can find similar books in the "Read Also" column, or choose other free books by C Ainsworth Charles Ainsworth Mitchell to read onlineMoreLess
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