Cling Film First or Pad First: Two Layouts, Two Outcomes

Two trays, same fish, same room, same night. Tray one: film on the tray floor, then a pad, then the product. Tray two: pad on the floor, film over it, product on the film. In the morning tray one has a wet sheet and a dry fillet. Tray two has a dry sheet, a puddle on the film, and a fillet with a slightly drawn, matte surface.

Neither is wrong. They do different jobs, and most kitchens pick one without deciding which job they wanted.

Pad under film: the sheet only sees what overflows

With film between pad and product, the drip lands on the film and runs to its edges, then drops onto the sheet at the perimeter. The pad still works, but only at the border, and it works unevenly — one end of the sheet loads while the other stays dry. Capacity utilisation drops to maybe 40 percent of nominal.

What you gain is a product that never touches absorbent material. That matters for fish destined for sashimi or for a display where surface appearance is the sale. The fillet keeps its own moisture film, doesn’t get the drawn, slightly suede look that direct contact can produce, and there is no fibre transfer to argue about.

Film over pad, product direct: maximum drying, maximum risk

Direct contact is the layout that removes the most water from the product’s environment, and it is also the one that dries the contact face. Leave a fillet on a 400 gsm sheet for 30 hours in moving air and the underside will lose more than drip: it loses surface moisture it needed, the texture firms, and the cooked result is noticeably drier at the edge.

That is fine for beef, which benefits from a slightly firmer surface and a better sear. It is not fine for delicate white fish or for scallops.

Choosing by product, not by habit

• Beef and lamb primals: direct contact, 300-400 gsm, film not needed.
• White fish fillets, whole day: pad under film, 250 gsm, change at 12 hours.
• Scallops and shellfish meat: pad under film, 200 gsm, 6 hours.
• Poultry: direct contact only, film traps moisture against skin and softens it.

The failure with the wrong lesson

A kitchen switched every tray to “film over pad” after a complaint about dry fish, and within a week the drip was running off the film onto the floor of the chiller because the film edges hung over the tray. Two trays per shelf, both dripping past the tray, and a wet chiller floor that got blamed on the defrost cycle.

If you use film, tuck the edges inside the tray wall. The film should form a shallow basin, not a canopy. A basin holds the liquid over the pad so it can pass through slowly; a canopy throws it onto the floor.

Film gauge and the loose wrap problem

A 12 micron film clings and seals against a tray wall; a 7 micron film stretches and lifts at the corner within an hour. On a thaw tray where the film is meant to form a shallow basin, gauge matters more than most kitchens realise, and a lifted corner turns the basin into a chute that drains onto the shelf.

Press the film down the full perimeter, not just the corners, and check it again at the change point. If the film has lifted, the drip has been running onto the shelf for hours, and the dry sheet underneath is not evidence that the pad is working.

There is also a labelling consequence. Water that reaches the film edge lifts printed labels and softens the adhesive, and a crate of unlabelled trays at dispatch is a rejection waiting to happen. A basin that holds water over the pad solves the pad question and the label question in the same motion.

Formats suited to a film-over-pad layout are described under pads for fillets and portioned fish, including the thinner sheets that work better when the product never touches the surface.

Whichever layout you pick, write it on the tray card. Mixed layouts in one chiller make every comparison meaningless, and they make it impossible to tell whether a wet tray is a pad failure or a film decision made by whoever was on earlies.