Dear f.fathalla,
The following is a cut and paste from the SWGMAT fiber training program:
Chapter 4 Fiber Transfer and Persistence
General Discussion
This training module will introduce the trainee to the basic concepts and theoretical knowledge of fiber transfer and persistence from two perspectives. First, it is transfer and persistence that imparts a value to textile fibers as associative trace evidence. Second, it is transfer and persistence that can result in fibrous evidence contamination and loss. It is intended that the trainee demonstrate a sound theoretical foundation of the contamination and loss concepts before exposure to actual evidentiary materials and practical basic skills.
Objectives Through completion of this module the trainee will develop the theoretical knowledge to be conversant in:
1. Locard's Exchange Principle;
2. the potential significance of fibers as associative trace evidence in forensic cases;
3. textile fiber sheddability;
4. fiber transfer mechanisms and factors affecting transfer;
5. fiber persistence mechanisms and factors influencing persistence, and
6. techniques utilized to prevent or reduce fibrous evidence contamination and loss from the time of field examinations through laboratory analyses including:
a. limiting contacts between items and individuals,
b. wearing appropriate protective apparel,
c. proper packaging, handling and labeling,
d. cleaning equipment and work surfaces,
e. maintaining controlled environments,
f. separation of evidence from different sources by location and/or time.
Here is the link:
http://www.swgmat.org/SWGMATfibertrainingprogram.pdf
If you explore this site:
http://www.swgmat.org/fiber.htm
I think you will find the answer to your question(s).
I hope this helps.
Ed Jones
>>> "f.fathalla" <f_f_ismail@yahoo.co.uk> 5/29/2011 4:28 PM >>>
Hello everyone
I want answer for this question please: Why shedding and shed tests are important concepts in the evaluation of forensic fibre evidence; what is shedding and shed tests? Could anyone please give me an answer for this question?
Many thanks
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