Test Items

As the quality of life continuously improves, consumers have increased expectations for the quality of clothing, food, housing and transportation. This is particularly obvious for food, beverage, medical and automobile products because qualities of these products can heavily influence human life and health. Therefore it has drawn enormous attention from enterprises and manufacturers to focus on these products' quality assurance. Notably, the quality control of relevant materials used in the production of these products plays an important factor in determining the overall product quality. Labthink's professional testing laboratory provides outsourced testing services for food and beverage producers, medical, pharmaceutical and cosmetics companies, and packaging and automobile manufacturers and many other industries and help them better determine and control their product qualities.

1. Testing Scope:

2. Service Workflow

3. Test Items

3.1 Standard Test Items

Remarks for the items marked with "*"
1. Determination of Heat Seal Parameters
1.1 $70 is charged for each test, which means performing a heat seal strength test at a specific temperature, pressure and dwell time.
1.2 At least 15 tests are required to obtain the optimized heat sealing parameters, which means customers will be provided with 15 heat seal strength results, each at different sealing temperature, pressure and dwell time. Besides, the optimized heat sealing parameters will be recommended.
2. Gas Transmission Rate of Specific Materials
Specific materials refer to very thick, rigid or uneven ones on which gas transmission rate test cannot be performed with regular instruments. Specific procedures will be applied to carry on such test.

3.2 CNAS Certified Test Items

4. Specimen Requirements

4.1 Raw Material
4.1.1 Barrier tests: at least 6 specimens are required for each test; specimen should be flat and integral with at least 100 mm in width and at most 3 mm in thickness.
4.1.2 Flex durability tests: at least 5 specimens are required for each test; each specimen should be at least 280 mm in length and 200 mm in width; for film bags, dimension is calculated when it is unfolded.
4.1.3 Falling dart impact tests: at least 30 specimens are required; specimen should be flat and integral with at least 150 mm in both length and width.
4.1.4 Other mechanical tests: at least 20 specimens are required; specimen should be flat and integral with at least 250 mm in length and 200 mm in width; for heat seal test, specimen length should be at least 350 mm.
4.1.5 All raw materials should be
a. without scratch, abrasion, damage, pinhole, or creases; without contamination; with intact ink layer; never contacted with unknown matter or exposed to an environment that may compromise test results; kept dry and clean.
b. Coiled before sent out to avoid wrinkles (for films and composite films only).
c. Sealed in uncontaminated, protective, and intact bags (for film bags and sheets only).
d. Sealed in dry, uncontaminated, protective, and intact bags or containers (for plastic containers only).
4.2 Finished Package
4.2.1 For leak test, heat seal test, and residual oxygen test, at least 10 finished packages with content filled in, 10 heat-sealed finished packages without content, and 5 defective finished packages with content filled in are required; each specimen should be at most 250 mm in length and 180 mm in width.
4.2.2 For headspace gas analysis test, at least 10 finished packages with content filled in, 10 heat-sealed finished packages without content, and 5 defective finished packages with content filled in are required; each specimen should contain at least 15 mL gas.
4.2.3 All finished packages should be:
a. finished packages with content filled in and heat-sealed finished packages without content should be out of scratch, abrasion, damage, pinholes, and creases; without contamination; with intact ink layer; never contacted with unknown matter or exposed to an environment that may compromise test results; kept dry and clean.
b. finished packages with content filled in, heat-sealed finished packages without content, and defective finished packages with content filled in should be kept separately before sent out.
4.3 Other Things to Be Noted
4.3.1 Test standard should be stated when the test application form is submitted. If no available test standard could be applied, test method should be negotiated.
4.3.2 If quantity of the test specimens does not meet the above requirements, test results could be only calculated from tests of the provided specimens.
4.3.3 Customers need to provide information such as the full name, specification, material and batch number of the specimen and notify Labthink whether the specimen should be returned.

5. Test Duration

6. Disclaimer

In no event will Labthink be responsible for any damages or penalties resulting from Labthink’s testing services or reporting of results or from use or distribution of the materials tested. Although Labthink endeavors to provide accurate testing and reporting, the testing and reporting of results are provided by Labthink without any warranty, express or implied, as to their accuracy. In no event will Labthink be liable for any direct, indirect, special, punitive, or consequential damages resulting from the testing or reporting of test results. Customer agrees to indemnify and hold harmless Labthink against any claims arising out of customer’s use, sale, or distribution of materials tested and against any claims arising out of customer’s breach.