Specific requirements for flexible material large packagings

51H flexible plastics
51M flexible paper

The large packaging shall be manufactured from suitable materials. The strength of the material and
the construction of the flexible large packagings shall be appropriate to its capacity and its intended
use.

All materials used in the construction of flexible large packagings of types 51M shall, after complete
immersion in water for not less than 24 hours, retain at least 85% of the tensile strength as measured
originally on the material conditioned to equilibrium at 67% relative humidity or less.

Seams shall be formed by stitching, heat sealing, glueing or any equivalent method. All stitched
seam-ends shall be secured.

Flexible large packagings shall provide adequate resistance to ageing and to degradation caused by
ultraviolet radiation or the climatic conditions, or by the substance contained, thereby rendering them
appropriate to their intended use.

For plastics flexible large packagings where protection against ultraviolet radiation is required, it shall
be provided by the addition of carbon black or other suitable pigments or inhibitors. These additives
shall be compatible with the contents and remain effective throughout the life of the large packaging.
Where use is made of carbon black, pigments or inhibitors other than those used in the manufacture of
the tested design type, re-testing may be waived if changes in the carbon black content, the pigment
content or the inhibitor content do not adversely affect the physical properties of the material of
construction.

Additives may be incorporated into the material of the large packaging to improve the resistance to
ageing or to serve other purposes, provided that these do not adversely affect the physical or chemical
properties of the material.

When filled, the ratio of height to width shall be not more than 2:1.

Specific requirements for plastics large packagings

50H rigid plastics

The large packaging shall be manufactured from suitable plastics material of known specifications and
be of adequate strength in relation to its capacity and its intended use. The material shall be
adequately resistant to ageing and to degradation caused by the substance contained or, where
relevant, by ultraviolet radiation. Low temperature performance shall be taken into account when
appropriate. Any permeation of the substance contained shall not constitute a danger under normal
conditions of carriage.

Where protection against ultraviolet radiation is required, it shall be provided by the addition of
carbon black or other suitable pigments or inhibitors. These additives shall be compatible with the
contents and remain effective throughout the life of the outer packaging. Where use is made of carbon
black, pigments or inhibitors other than those used in the manufacture of the tested design type,
re-testing may be waived if changes in the carbon black content, the pigment content or the inhibitor
content do not adversely affect the physical properties of the material of construction.

Additives may be incorporated in the material of the large packaging to improve the resistance to
ageing or to serve other purposes, provided that these do not adversely affect the physical or chemical
properties of the material.

Specific requirements for fibreboard large packagings

50G rigid fibreboard

50 G rigid fibreboard

Strong and good quality solid or double-faced corrugated fibreboard (single or multiwall) shall be
used, appropriate to the capacity of the large packagings and to their intended use. The water
resistance of the outer surface shall be such that the increase in mass, as determined in a test carried
out over a period of 30 minutes by the Cobb method of determining water absorption, is not greater
than 155 g/m2 - see ISO 535:1991. It shall have proper bending qualities. Fibreboard shall be cut,
creased without scoring, and slotted so as to permit assembly without cracking, surface breaks or
undue bending. The fluting or corrugated fibreboard shall be firmly glued to the facings.

The walls, including top and bottom, shall have a minimum puncture resistance of 15 J measured
according to ISO 3036:1975.
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