Risk and emergencies15 / 29

An instant pack, a gel pack and a GEBHARDT eutectic plate differ in filling, in the risk to goods they touch and in the first decision: what to record at delivery, how cold the replacement plate must be frozen, and which records decide acceptance.

Yes: a product surface can freeze near a pack while average air looks acceptable. The lower limit, product points and layout are tested together.

An intact reusable pack or eutectic plate is frozen again after thawing. Instant cold packs and packs that leak or crack do not go back into the freezer.

Ordinary ice melts at 0 °C and leaves free water in the box. A sealed pack keeps its filling inside the shell, and a eutectic plate can be chosen with a melting point between -3 and -21 °C.

A gel pack is heated only when its label gives a heating method. A heated pack holds little heat because nothing changes phase, so it cannot keep hot food above 60 °C on a long route.

A frozen gel pack touching the product can freeze the contact point even while box air looks acceptable. The freezing limit, plate melting points and separator criteria are given below in numbers.

A gel pack made for reuse can be refrozen while its shell stays intact. The freezer setting follows the plate's melting point, and for vaccines CDC sets a stricter rule.

A leaking gel pack stops the shipment. Goods, gel pack and transport box each get a separate decision: the goods decision rests on the safety data sheet, the box decision on the cleaning record.

A pack that stays soft may be unfrozen, or frozen but still flexible. The glycol content and the freezing time tell the two apart.

Reusable gel packs are mostly water and propylene glycol, and minor contact causes mild irritation. Instant cold packs are the type that needs care; a leaking pack and the goods it touched are set aside.

An ice pack is frozen at least 5 °C below the melting point of its filling. For a GEBHARDT plate that melts at -18 °C, that means -23 °C for 24 hours.

An empty box is light but bulky. Sunlight, the pressure of one narrow contact point and look-alike models are the three ways stock gets damaged; each one comes with a figure and a check.

Record damage and handover conditions before opening. Assess packaging damage and product acceptance in separate processes.

The inner box should not shift, and supports should not crush its walls or lid. Validate the pack with the carrier's applicable test conditions.

In the ATP IR class the average K value of the body is at most 0.40 W/m²K. Thin sections at corners and in the lid channel pass more heat than that average; where they sit and how much heat they pass, in numbers.

Inspect an empty box on a level surface along all four edges; use a maker specification or approved packaging trial for criteria.