Part V: Lip Printing (Lipstick Activity)

History of Lip Printing: In was  in 1930, that Diou de Lille developed some studies which led to lip printing being used in criminology. Lip prints were first recommended to be used in 1932 by Edmond Locard a French criminologist. In the 1960s Martin Santos suggested that the fissures and the criss-cross lines in the lips could be divided into different groups (simple and compound), and each group could be further divided into eight subtypes. The study of lipprinting has also been given the name cheiloscopy. In 1967 Suzuki made detailed investigations of the measurement of the lips, the use and color of lipstick, and methods to obtain useful data for forensic application. Later in 1970, K. Suzuki and Y. Tsuchihashi, conducted a study on Japanese families and named the grooves on labiorum rurorum as sulci labiorum and the lip prints consisting of these grooves as ' Figura linearum labiorum rubrorum '. There are many different types of classification for lip prints but listed below is that of Suzuki and Tsuchihashi.

Suzuki and Tsuchihashi Classifictation of Lip print:

Classification	Groove type
Type I	Complete vertical
Type I'	Incomplete vertical
Type II	Branched
Type III	Intersected
Type IV	Reticular pattern
Type V	Irregular

Analysis and Recording a lip print:
In order to analyze a print often times different powders are used so that a photograph can be taken of the print. Aluminum powder, silver metallic powder, silver nitrate powder, and plumb carbonate powder are brushed over the print make visible and easy to analyze, using transparent overlays the print can even be traced. Plumb carbonate is a white powder that can be used with a brush over smooth, polished, and metallic surfaces. Because this powder is white it can not be used on white surfaces, in this case, marphil black powder or fat black aniline dyer are better choices since they both have a dark color. Silver nitrate can lead to positive results on non-ideal surfaces, such as untreated wood or cardboar. all of the powder listed above are used to lift lip prints.

Lip Priting In Class:

In order to study the print of lips as we did fingerprints each student used lipstick to make a print on a note card. A lip print, like a fingerprint i s unique to every person, this purpose in making our own print was to identify defining characteristics of our prints.

Sources:

http://www.xproexperts.co.uk/newsletters/feb07/article1.php