natural color of most
plastic storage tank resins is a translucent, milky
white. That works very well in most cases because you
can see the level of the stored liquid through the
sidewall of the tank.
times when you may be better off by having a plastic
storage tank of a different color. This may be true if
the liquid you are storing will be degraded by Ultra
Violet light from the sun. Another color may be
beneficial for branding purposes, to communicate that
the liquid is hazardous or just to prolong the life of
the plastic storage tank.
Water tanks are most often colored black or
forest green. Any color will work so long as the tank
is opaque and blocks out the UV rays from sunlight.
Water tanks that have translucent walls will have algae
growth that is not desirable.
Hypochlorite) storage tanks are best if
they are an opaque white. Bleach will degrade if stored
in a translucent tank that allows the UV rays to come
through. Bleach will also degrade under higher heat
that comes from using black or dark colored plastic
tanks for storage. A white, opaque tank is the
recommendation of the Bleach Council. In years past,
most bleach was stored in black plastic storage tanks
and some companies have not kept up with the change in
tank color recommendations. There is significant
difference in the temperature of a stored liquid in a
white tank versus a black tank on a hot summer day.
Black tanks are good options when the chemical
does not degrade from higher heat. The black walls
limit the UV rays that affect the inner part of the
plastic tank wall. The Ultraviolet rays have a negative
impact on polyethylene so opaque walls will prolong the
life of the tank. One down side of opaque tanks is the
need for level gauges of some type to let you keep track
of the fill level of the liquid in the tank. If the
tank is in a building and already sheilded from
sunlight, a normal translucent tank is less expensive
and just as effective.