Fabrics made from celulose such as denim cottons,
are very popular. After a certain time of use, these garments develope
in their borders and sewing areas, different coloring fading depths.
To obtain this artyificial aging, manufacturers utilize different
tecniques. One of them is the stone wash process. Wet clothes are
revolved in machines together with pieces of volcanic stones (pumice
stones), of sizes in between 1 and 8 inches. The abrasion caused
by these stones, produce a decoloration effect.
Also, decolorations can be performed by chemicals mixed with small
grains of pumice stone. These grains are saturated with chlorine
and other products that act like bleachers.
Other tecniques for fabric decoloration is the utilization of ozone
dissolved in liquid. This last process, avoids the use of pumice
stones, wich can, very fast, deteriorate the discoloration machines.
