Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document
GBT191-2008
Packaging, Storage, and Transportation Pictorial Symbols
GB/T 450-2008
Paper and Board Sampling
GB/T 451.1-2002
Paper and Board Dimensions and Skewness Determination
GB/T 2792-2014
Pressure Sensitive Adhesive Tape 180 ° Peel Strength Test Method
GB/T 4851-2014
Pressure Sensitive Adhesive Tape Holding Adhesion Test Method
GB/T 4852-2002
Pressure Sensitive Adhesive Tape Initial Adhesion Test Method
Rolling Ball MethodGB/T7125-1999
Test Method for Thickness of Pressure Sensitive Adhesive Tape and Adhesive Tape
GB/T 7707-2008
Gravure Decoration Printing
GB/T 21027-2007 General Safety Requirements for Student Supplies QB/T3805-1999 PVC Wallpapers
Classification and Use
According to their use, they are divided into ordinary book covers and high-end book covers. 3.1 Ordinary Book Cover
3.1.1 Transparent Book Cover: The fabric color belongs to the transparent and colorless type, and the material can be divided into three categories: PVC, CPP, OPP, etc. It is mainly used for veneer protection of books
3.1.2 Embossed Book Cover: It is mainly used for book veneer protection by surface tattooing and modifying on ordinary environmentally-friendly PVC transparent substrate to form various three-dimensional geometric shapes, flowers
bird, insect, and fish patterns.
3.1.3 Colorful Transparent Book Cover: A base material with both color and good light transmission effect, which can be divided into three types: PVC, CPP, OPP, etc. It is mainly used for veneer protection of books
3.2 Upscale Book Cover
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China