jimtrue.com : school : CJT2240 : 2003-06-19: Whorl Tracing
Posted by Jim True on June 19, 2003 7:45 AM. Last Updated October 22, 2006 9:23 PM
Disclaimer for all material noted here is at the bottom of this web page.
Plain Loop Whorl Rules - P
Two deltas with imaginary line drawn between them will cut recurve of the inner pattern area.
Central Pocket Loop Whorl Rules - C
Double Loop Whorl - d
Accidental Loop - X
Tracing Whorl Rules
Count Loops and Trace Whorls. Have to know the amount of lines from one delta to the other.
Trace from left delta to a point opposite the right delta.
Trace from the farthest left to the farthest right delta.
Drop down at ending ridges and follow lower fork of a bifurcation.
3 or more ridges inside the right delta- INNER
3 or more ridges outside the right delta - OUTER
1 or 2 ridges or stops at right delta - MEETING
When 3 you reference to an M.
DO NOT COUNT DELTA OR TRACING RIDGE.
Accidental or Double Loop Whorl Tracing (accidentals only extreme outer deltas are considered).
Tracing goes upward above the right delta, stop the tracing when it passes inside the right delta when it begins the upward trend. Almost always an INNER tracing.
No upward trend, follow the tracing to a point opposite the right delta or the delta itself.
Labeling:
| Type of Whorl | Inner | Outer | Meeting |
| Plain | PI | PO | PM |
| Central Pocket | CI | CO | CM |
| Double Loop | dI | dO | dM |
| Accidental | XI | XO | XM |
Tracing Whorls - UNPRINTED DELTAS; use the opposite finger (the block below this one on the fingerprint card).
Disclaimer: These are MY notes taken from classroom lectures while I'm in the classroom. While I'm perfectly happy to share my notes with my classmates and I know I take very good notes, you should still make every effort to attend the class and TAKE YOUR OWN NOTES. I will not transcribe everything the instructor says in the classroom, and I will NEVER post pre-exam reviews. My notes will not replace the value of actually attending class and taking your own class notes.I also cannot attest to their accuracy, other than they are what was provided in the lecture; you should not reference my notes as "expert opionion" by any means, and if you notice an error or omission, please do me the favor of e-mailing me with the correction and I will re-post my notes. End of Disclaimer.