How to
ship CRT by mail
A Cathode-ray
Tube is a fragile electron tube and its glass
envelope is under high vacuum. In order to
minimize breakage risks when shipped by mail or
freight forwarders, some packing precautions are
needed :
a) Any CRT needs
to be double boxed. This means the tube must
be placed inside a box or carton, that will
be put inside a greater outer box.
b) Some CRT have
your own original manufacturer box or carton. The
internal empty spaces of the box must be filled
with plastic foam flakes, or "worms".
The CRT base pins must to keep free, not touching
the box bottom. Thus, neck breaking
stresses are prevented, in case of tube movement
during the travel. Some original cartons have a
cellulose fiber wad locking the tube base; it
needs to be removed and the empty space filled
with plastic foam flakes. Another way is to wrap
the tube in plastic bubble sheet putting all
inside the carton. In both cases, the idea is to
keep the tube immovable inside its carton, at the
same time leaving an accidental adaptation.
c) CRT with no
own carton could be just wrapped in plastic
bubble sheet if a suitable small box is not
available. The protect plastic layer around the
tube must be about 1 1/4 inch thick and must to
protect the base and the screen properly.
d) The outer box
must be of thick, rigid cardboard, preferably new
and with no damages. There must be a 3 inch
clearance between the packed or wrapped CRT and
the outer box, in all directions. This space must
be filled completely with plastic flakes,
pressed in a manner the inner box or packet keep
immovable during all the travel. All the box
edges must be strongly sealed with plastic
adhesive tape, giving an additional mechanical
reinforcement.
e) Write
"FRAGILE" in big size letters, on the
outer box...and trust in the luck a little...I
had received a dozen of CRT by mail and just only
one results broken. It was just shipped inside
your own carton, inside in another box, with no
greater precautions...
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