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Articles from The Science Of Fingerprints

The Use Of The Fingerprint Camera

Central Pocket Loop

Types Of Patterns

Advanced Decomposition

Death Notices


Double Loop

X-ray Photography

The Classification Formula

Technical Consideration

X-ray Photography

The use of X-ray photographs (radiography) has been advocated by some
for purposes of recording the ridge details in decomposed, desiccated,
or macerated cases. Briefly, the procedure involves the covering of
the fingers with heavy salts such as bismuth or lead carbonate, in a
thin, even film over the pattern area and then, by the use of the
X-ray, reproducing the ridge detail. This procedure necessitates the
use of X-ray equipment and a technician skilled in making radiographs.
It is, therefore, an expensive operation. The results of the
radiograph in no way compensate for the expense, time, and skill
required inasmuch as in those cases where many wrinkles and creases
appear in the fingers, especially desiccated specimens, the results
have been very poor. In instances where there are no wrinkles or only
a few, and where the creases are not too deep, the ridge detail is
reproduced very well in the radiograph. In these cases, however, it is
usually possible to secure impressions by inking and rolling in the
regular way or, should this fail, ordinary photography will certainly
give satisfactory results. For economical and practical purposes the
use of the X-ray is not recommended.

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