Tonal Transitions: Causes and Visual Effects – Alice White

$0.00

10 in stock

DATE: Tuesday, June 21

TIME: 8:00 am – 12:00 pm

10 in stock

Tonal Transitions: Causes and Visual Effects (4 hours)
Ideally, the ridges in the friction ridge skin contact a surface and transfer an even coating of residue to the surface. This residue is then targeted by a latent print development technique, resulting in an impression that has distinctive ridges and furrows that require minimal eye strain to follow. But the world of latent prints is rarely so neat and tidy.

In this workshop we will look at many ways the ridges and furrows stray from this ideal condition. We will first discuss the composition of latent print residue (it is NOT 98-99% water as many of us were told). We will then discuss the different ways residue can be distributed across the surface of the skin and how this distribution matters when a surface is touched. After contact with a surface has been made, the manner in which the skin slides through the residue wreaks all kinds of havoc on the tone of the ridges and furrows – we will explore the many visual anomalies associated with movement. Lastly, we will practice tracing ridges displaying various tonal issues.

Instructor:
Alice (Maceo) White has a Bachelor of Science in Biology from the University of Alaska, Anchorage. She has worked in latent prints since 1997 and was the manager of the Latent Print Detail of the Las Vegas Metropolitan Police Department for 12 years (2006 – 2018). Alice has served on several working groups and professional committees throughout her career. Alice currently serves as a member of the OSAC Friction Ridge Subcommittee, AAFS Standards Board Footwear and Tire Consensus Body, and RTI Human Factors in Forensic Practice Sourcebook – Working Group. Alice has published multiple articles and provided lectures, workshops, and courses throughout the United States and beyond. Due to COVID, Alice reengineered her classes into a series of live webinars through her company, Evolve Forensics.

Product Description

Tonal Transitions: Causes and Visual Effects (4 hours)
Ideally, the ridges in the friction ridge skin contact a surface and transfer an even coating of residue to the surface. This residue is then targeted by a latent print development technique, resulting in an impression that has distinctive ridges and furrows that require minimal eye strain to follow. But the world of latent prints is rarely so neat and tidy.

In this workshop we will look at many ways the ridges and furrows stray from this ideal condition. We will first discuss the composition of latent print residue (it is NOT 98-99% water as many of us were told). We will then discuss the different ways residue can be distributed across the surface of the skin and how this distribution matters when a surface is touched. After contact with a surface has been made, the manner in which the skin slides through the residue wreaks all kinds of havoc on the tone of the ridges and furrows – we will explore the many visual anomalies associated with movement. Lastly, we will practice tracing ridges displaying various tonal issues.

Instructor:
Alice (Maceo) White has a Bachelor of Science in Biology from the University of Alaska, Anchorage. She has worked in latent prints since 1997 and was the manager of the Latent Print Detail of the Las Vegas Metropolitan Police Department for 12 years (2006 – 2018). Alice has served on several working groups and professional committees throughout her career. Alice currently serves as a member of the OSAC Friction Ridge Subcommittee, AAFS Standards Board Footwear and Tire Consensus Body, and RTI Human Factors in Forensic Practice Sourcebook – Working Group. Alice has published multiple articles and provided lectures, workshops, and courses throughout the United States and beyond. Due to COVID, Alice reengineered her classes into a series of live webinars through her company, Evolve Forensics.

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