Olympic GRAPE Packing Guide

PUNNET PREPARATION WEIGHT PREPARATION

Each bulk box or punnet must be weighed to meet the specified weight. If a punnet is underweight, it must be adjusted to the correct weight. The net weight is the weight of the grapes alone, excluding the packaging (e.g., the punnet). Gross weight includes the fruit, any moisture loss, and the packaging. To account for moisture loss over the product’s shelf life, an additional 4% weight should be included in all packed products. NET WEIGHTS (excluding packaging): 500G PUNNETS : Minimum 520g (500g plus 4% for moisture loss), maximum 560g. By the end of the shelf life, the minimum net weight must exceed the declared pack weight (e.g., 500g). The maximum net weight should not surpass 12% of the punnet weight; for a 500g punnet, this means not exceeding 560g. This limit is set to ensure even weight distribution and minimise bruising. Overweight punnets must be reduced, which can be costly.

Moisture tare at the time of packing is 4%, so a 500g punnet should weigh at least 520g. Underweight punnets need to be adjusted, which is also costly. Punnet tare weights differ between manufacturers. A typical 500g punnet weighs between 15 and 18g. When setting the punnet tare weight, calculate the average weight of at least 20 punnets.

NET WEIGHT CALCULATION:

Declared pack weight

Moisture loss

GROSS WEIGHT CALCULATION:

Declared pack weight

Moisture loss

Packaging

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