The formula for calculating the void ratio of gift box packaging is: Packaging void ratio=(the ratio of the necessary space volume occupied by removing the contents inside the packaging to the total volume of the packaging). The packaging void ratio is an important indicator for measuring the efficiency of packaging design, which reflects the efficiency of utilizing the internal space of the packaging. Specifically, the packaging void ratio is determined by calculating the ratio of the necessary space volume occupied by removing the contents inside the packaging to the total packaging volume. This ratio can help us evaluate the rationality of packaging design and whether there is an issue of excessive packaging.
In practical applications, the calculation of void ratio in gift packaging involves multiple factors, including the volume of the contents and the necessary space coefficient of the packaging. For example, in tea packaging, the volume of the contents can be converted based on the net content indicated on the product label, while the necessary spatial coefficient of the packaging is determined based on the specific type of product. Based on this information, the maximum allowable outer packaging volume can be calculated and compared with the actual measured outer packaging volume to determine whether the packaging void ratio meets the standard requirements.
Does the current packaging of a certain tea gift, measuring 300mm in length, 200mm in width, and 100mm in height, with 3 packs of 50g tea inside, meet the standard for void ratio?
3000mm in length, 200mm in width, and 100mm in height= 300x200x100=6000000
The interior is 150gV=150x1000=150000
Substitute the numerical value into the formula to obtain the current packaging void ratio
According to the table in the figure, the porosity of 50g tea should be ≤ 40%
89.17%>40%6
So if the porosity of the packaging is not qualified, it will face the risk of being taken down and fined
How to quickly determine the porosity of customized paper gift box packaging?
（1） Weigh or find the total mass of fresh edible agricultural products. Determine whether there are small packages and the minimum total packaging mass, and determine the packaging void ratio based on the category of fresh edible agricultural products and the minimum total packaging mass.
（2） Calculate the maximum allowable outer packaging volume.
The maximum allowable outer packaging volume is equal to the necessary space effect of the product multiplied by the total mass divided by (1- packaging void ratio)
（3） Measure the outer packaging volume of the product.
（4） Compare the allowed maximum outer packaging volume with the measured outer packaging volume. If the measured outer packaging volume is greater than the allowed maximum outer packaging volume, the packaging void ratio does not meet the standard requirements. If the measured outer packaging volume is less than or equal to the allowed maximum outer packaging volume, the packaging void ratio is qualified.
Requirements for packaging porosity of pastries
According to GB 23350-2009 "Restrictions on Excessive Packaging Requirements for Food and Cosmetics", the porosity of pastry packaging should not exceed 60%.
The calculation of the packaging void space coefficient K involves multiple steps and parameters, and the specific calculation method is as follows:
Determine the necessary spatial coefficient (k value) for the product: Determine the applicable k value based on the category of the product. For example, for tea and its products, if subdivided, the k value for compressed tea is 9, while the k value for other tea and related products is 13. For specific tea varieties, such as Taiping Houkui and Lu'an Gua Pian, the k value is 20, while the k value of leaf and flower substitute tea is 60.
1. Ensuring the safety of goods: Maintaining a reasonable void ratio during packaging and transportation can provide necessary protection for the goods and prevent them from being damaged by external forces during transportation.
2. Reduce transportation costs: An important component of transportation costs is the cost of transporting goods. A reasonable void ratio can reduce the transportation cost of air cargo and avoid space waste caused by oversized packaging and unnecessary fillers.
Calculate the necessary space volume (Vn): The necessary space volume is the product of the interior volume and the necessary space coefficient (k value) for the product. This calculation takes into account the spatial measurement required to protect food or cosmetics.
The necessary space coefficient is the core indicator of packaging gaps, and the smaller the value of packaging compactness, the smaller the packaging gap.
Calculate packaging void ratio (X): Packaging void ratio is calculated by comparing the sales packaging volume (Vn) of the product with the volume of the contents. The specific formula is: packaging void ratio=(volume of product sales packaging - volume of contents)/volume of product sales packaging x 100%. This formula is used to measure the proportion of excess space in packaging to evaluate whether the packaging is excessive.
The new standard for restricting excessive packaging of goods, GB 23350-2021 Restricting Excessive Packaging of Food and Cosmetics (hereinafter referred to as the "New Packaging Standard"), will be officially implemented on September 1, 2023.
Excessive packaging does not require excessive interpretation, it is important to adhere to a few principles: first, do not pass off inferior products as good, sincerity is precious, and comply with packaging costs; Secondly, the larger the container, the better. It is not as precise as it is large, in line with the volume ratio; Thirdly, it's not that good horses should be paired with good limbs, but rather that the golden saddle should not be paired with inferior horses. Packaging and other factors have nothing to do with the material!
Regulations on void ratio requirements for customized gift packaging of health products
According to the Food Packaging Standards, the void ratio of health food packaging must not exceed 50%, and the number of packaging layers must also be at least 3.
The calculation formula for void ratio is relatively cumbersome, which often leads to many designers being overwhelmed and calculating multiple times. In the end, it is still calculated. It is recommended to use a small program to calculate it. We can display the results by inputting the corresponding data box structure dimensions and so on!
Our usual medicine boxes, cosmetics boxes, snack bags, etc. are often impure in terms of void ratio. More often than not, they are gift box packaging, such as mooncake packaging, tea packaging, etc. If it is a commonly used packaging design, the size of the box and the bottle will not be much larger, and it usually does not need to be calculated. They generally meet the requirements and specifications of packaging void ratio!
(Food Packaging Standards)
The Food Packaging Standards stipulate that the packaging layers and void ratio of beverages, alcohol, pastries, health products, snacks, tea and other foods must comply with certain standards. For example, in the case of alcoholic beverages, the ratio of unnecessary space volume in the product sales packaging to the volume of the product sales packaging (i.e. the package clearance ratio) shall not exceed 55%.
ITIS customized paper gift box packaging factory, as a well-known manufacturer, we will provide sufficient suggestions at the beginning of customers' proposal, thereby reducing the time wasted in the early design of custom gift boxes.
