Page 61 - Jamaica Post Office Guide 1977

60 POST OFFICE GUIDE
General Information: Categories of Dangerous Articles:
Brief Description and Examples, Embarrassing Packets, contd.

9. Other dangerous articles: Comprising those articles which although not j
the above categories have noxious or irritant properties; solids why
dampness renders corrosive; or again substances having other inhen
properties which could endanger human life or damage other mails (e,
acetaldehyde of ammonia, sulphate, ammonia, brewers’ yeast, no
pressurised liquid gases, potassium and sodium hydroxide, etc.).
EMBARRASSING PACKETS
Packets embarrassing to the Post Office staff are also prohibited. Emb
ment may be caused by the method of addressing and the affixing of the sti
the colour, type, shape and dimensions of the envelope, packet or card; and j
the use of a badly reconditioned envelope which has already passed through
post.
An envelope of which the whole or part of the address side, has been divid
into several sections to provide for successive addresses.
The following are considered to be embarrassing packets:—
Addresses: A packet having its address parallel to the breadth instead of to I
length of the envelope.

A packet having anything printed or otherwise impressed upon or attached!
the address side which, either by tending to prevent the easy and quick reading (
the address, or by inconvenient proximity to the postage stamps or in any
way, is likely to impede the officers of the Post Office in dealing with it. '
envelopes, folders, labels and wrappers are however, admitted if the writing
printing is confined to the left-hand half of the address side, the right-hand
being reserved exclusively for the postage stamps and address.
Stamps: A packet bearing on its address side an adhesive label or printed de
either resembling a postage stamp in shape or size or in the form of a frame fa
postage stamp.
A packet having a postage stamp affixed elsewhere than at the right-hand I
corner of the address side.
Colour: Red packets or envelopes of any other colour likely to cause strain on j
eyes of the officers of the Post Office. Cards, folders, labels or envelopes sho
be white, but there is no objection to pale shades of buff, yellow green or I'
It is essential, however, that the ink used on coloured paper should be in sti
contrast with the tint of the paper. The foregoing also applies to the visible porl
of enclosures in envelopes with transparent or cut-out panels.

Transparent or Open Panel Envelopes
A packet enclosed in a wholly transparent envelope, or an aperture envel^
that is an envelope with an open (cut-out) panel.
Ordinary Envelopes: Are divided into 2 categories; Standardised and
Standardised.
Standardised Items: The Post Office considers as standardised:
Envelopes with the following dimensions:—
Minimum dimensions: 90 x 140 mm (3}" x 51")
Maximum dimension: 120 x 235 mm (4i "x 9J")
Maximum weight : 20 grams
Maximum thickness: 5mm