Sources of Error
1) a) Powders that provide a color contrast to the item color will
provide the clearer and more easily identifiable fingerprints from
each item. Fluorescent powder will give the best print on
b) It will be possible to develop fingerprints found on most of the
different item materials that could be found at a crime scene. It will
not be possible to develop fingerprints on cloth and rope because of
the texture of the fibers.
c) Fingerprints developed and lifted from items that have smooth and
flat surfaces will be more clear and identifiable than those found on
items with rough or curved surfaces.
d) The number of items that can be developed from each room depends on
the material and surface type of the items found in each particular
2) It will be difficult to develop a system of assigning a
quantitative number to each fingerprint regarding clarity, detail of
the ridges and how well it matches with the original print.
Fingerprinting is mostly a qualitative analysis and it is hard to take
something qualitative and make it quantitative while maintaining