It is essential to check with buyers to determine size and grading requirements. A second layer of fruits is placed on top of the first, which should remain flush with or slightly lower than the top of the carton so that the fruits are not forced down when the lid is closed. This method of packing prevents excessive movement and settling of the fruits during handling and transportation. Carton net weights are 2 kilograms to 4 kilograms, depending on the requirements of the importing country and the buyer. Some markets prefer lychees prepacked in punnets, clamshells, or trays wrapped with plastic film.
Ventilation is required in all four walls.
Narrow vertical ventilation is preferred because round vent holes become blocked by the fruits. If one-piece cartons are used, there should be a maximum of 2 centimeters between the lid and the fruit. Carton dimensions vary depending on the net weight and the market. If a cold chain can be maintained, the faster the fruits are cooled, the longer they will retain the quality they had when harvested. Fungal growth at this temperature is minimized, and the fruits retain their color, texture, and flavor.