Many beginning

practitioners complain of losing some of
their knives, especially their practice knives for live target
training, due to bad throws, rebounds, and misses which
become difficult to find. To at least partially eliminate this
difficulty, a number of steps can be taken. One solution is to
spray paint the knives with a bright color. Another solution
is to tie a bright colored length of cord or wool to the knife.
The string will not affect the flight of the knife much, but it
will make it easier to find.
Long Range Throws
Knives are seldom thrown over distances of thirty feet, but
once Ninja have gained a mastery of the basic skills at this
distance, they may wish to mark or stake out longer ranges
of 35, 40, 45 and 50 feet. Fifty feet is the approximate
maximum range for a thrown knife. Such long range throws
require exceptional skill, power, and control to make a knife
stick at such a distance.