The process and workflow for custom printing packaging bags involve several steps, from design to production. Here is a detailed breakdown.
1. Design and Preparation
Requirement Analysis
Communicate with the client to understand their needs, including the size, material, color, design, and quantity of the bags.
Design Creation
Use graphic design software (such as Adobe Illustrator or CorelDRAW) to create the design draft for the packaging bag. The draft should include all patterns, text, and colors.
Sample Confirmation
Produce a sample bag based on the design draft and provide it to the client for approval. Make necessary modifications until the client is satisfied.
2. Plate Making
Design Transfer
Transfer the final approved design draft to the printing plate. You can choose to use photopolymer plates for flexographic printing or copper plates for gravure printing.
Plate Making Process
Flexographic Printing: Create photopolymer plates using photosensitive materials and UV exposure techniques.
Gravure Printing: Create copper plates through engraving or chemical etching techniques.
3. Printing
Material Preparation
Select suitable plastic films (such as PE, PP, PVC, etc.) as the printing material.
Printing Setup
Install the prepared printing plate onto the printing machine and adjust machine settings, including pressure, speed, and ink volume.
Print the design onto the plastic film using the printing machine. Common printing methods include flexographic printing, gravure printing, and screen printing.
4. Bag Making
Cutting
Cut the printed plastic film into the desired bag shapes according to the required dimensions.
Forming
Use a bag-making machine to process the cut film into bags. This process includes sealing the edges, adding a bottom, adding zippers, or other special treatments.
Inspection
Conduct quality inspection on the finished bags, checking print quality, dimensions, sealing, and functionality (such as the smoothness of zippers).
5. Post-processing and Packaging
Post-processing
If necessary, perform surface treatments, such as lamination, hot pressing, or other special treatments to enhance the strength and appearance of the bags.
Packaging
Package the finished bags according to the client’s requirements, usually bundling or boxing them in specified quantities.
Shipping
Ship the packaged finished bags to the client, ensuring delivery within the agreed timeframe.
6. Quality Control
Continuous Monitoring
Implement strict quality control throughout the entire production process to ensure each step meets the standards.
Issue Resolution
Address and rectify any quality issues promptly to ensure the final product meets the client’s requirements.
Summary
The process and workflow for custom printing packaging bags involve steps from design, plate making, printing, bag making, to final post-processing and packaging. Each step requires precise operation and strict control to ensure th
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The process and procedures of custom printed packaging bags