Palm Prints and Print Processing Quiz 5

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

Palm Characteristics

Back (Answer)

3 Regions. 3 major creases (top, middle, left). Left hand: Waterfall left. Right hand: Waterfall right,

Front (Question)

Palm Regions

Back (Answer)

Thenar (thumb). Hypothenar (pinky). Interdigital (fingers).

Front (Question)

Interdigital Region

Back (Answer)

Wavy flow: ridges flow down, over, up, and out. Tri-radii.

Front (Question)

Tri-Radii

Back (Answer)

Convergence of ridges. Ridges flow in, away, and up. Looks like a delta. Found primarily in the interdigital region, but also sometimes in the hypothanar region.

Front (Question)

Hypothenar

Back (Answer)

“Writer’s palm”. Down and out formations: ridges flow down and out from the interdigital to hypothenar. Edge creases: more defined and different directionality than thenar edge creases.

Front (Question)

Fingers: General

Back (Answer)

Ridge flow of fingers is inner to outer. 1 crease between 1st and 2nd joint. 2 creases everywhere else.

Front (Question)

Fingers: First Joint

Back (Answer)

First joint always has a pattern. If no observed pattern, it is not the first joint.

Front (Question)

Fingers: Third Joint

Back (Answer)

Down and out ridge flow on index and pinky. Wavy ridge flow middle and ring. Has hash marks and flexion creases.

Front (Question)

Fingers: Second Joint

Back (Answer)

Second joint ridges in a linear fashion. Follow flow of arrows.

#10

Front (Question)

Skin Conditions

Back (Answer)

Displasya. Psoriasis. No ridges.

#11

Front (Question)

Displasya

Back (Answer)

Refers to an abnormality in the mutation of cells within a tissue.

#12

Front (Question)

Latent

Back (Answer)

Hidden. Refers to any print that must be enhanced chemically or physically to be made visible.

#13

Front (Question)

Leaving a Latent Print

Back (Answer)

Simply sweat exuded from the body. Friction ridge skin does not exude oil. If present, it is picked up from another area of the body.

#14

Front (Question)

Basic Types of Print Processing.

Back (Answer)

Physical. Chemical.

#15

Front (Question)

Types of Physical Processing

Back (Answer)

Powdering. Mikrosil/Accutrans/Forensic Sil.

#16

Front (Question)

Types of Chemical Processing

Back (Answer)

Cyanoacrylate Fuming (Super-glue). Ninhydrin. RAM. Rhodamine. Ardrox.

#17

Front (Question)

Powdering

Back (Answer)

Application of finely ground colored powder. Always on a non-porous surface. Makes latent prints visible.

#18

Front (Question)

Powdering: How it Works

Back (Answer)

Powder clings to moisture, oil, or other residues left behind when friction ridges touch an object.

#19

Front (Question)

Characteristics of Powder

Back (Answer)

Passable through 200-mesh screen. Possesses adhesive qualities. Free-flowing and non-clumping. Not caustic, toxic, or carcinogenic.

#20

Front (Question)

Powdering: Surfaces

Back (Answer)

Best used on smooth, non-porous surfaces. Glass. Metal. Finished Wood. Plastics. Not suitable on wet, rough, or tacky surfaces.

#21

Front (Question)

Powdering: Considerations

Back (Answer)

Always consider effects of powdering on forensic exams. Before using powder, conduct careful visual examination of each item.

#22

Front (Question)

Powdering: Order

Back (Answer)

Powder applied after super-glue process. Once an item has been powdered, no further latent print examinations can be performed.

#23

Front (Question)

Powdering: Colors

Back (Answer)

White. Gray/Silver. Black. Magnetic.

#24

Front (Question)

Other Powders

Back (Answer)

Different types of toner (Xerox). Granular powders in red, bronze, gold, etc. Fluorescent powders (not recommended for use by FBI ERT for field processing.