Printing on the surface of your packaging container, is the easiest yet most important way to customize your product.
Here are some different printing techniques explained for you:
1. Silk Screen Printing
Sengmi Packaging Automatic Silk Screen Printing Machine
Theory: This method is based on the fundamental concept where the mesh in the image areas of the screen is permeable to ink, while the non-image areas are blocked. During printing, a squeegee applies pressure to the ink on the screen, forcing it through the open mesh areas onto the substrate. Each screen is used for one specific color area.
Characteristics:
Advantages: Thick ink layers to the touch, vibrant colors, strong coverage, excellent durability, waterproof; relatively low cost; suitable for flat and simple curved surfaces.
Disadvantages: Slower printing speed; not suitable for high-precision, highly complex gradient patterns; relatively lower color registration accuracy.
Applications: 1~4 colors printing on any type of packaging with a smooth surface.
2 Heat Transfer Printing (Hot Stamp)
Sengmi Packaging Hot Stamp Machine
Theory: The pattern is first printed with special inks onto a carrier (like release paper or PET film) to create a transfer foil. Then, through the application of heat and pressure, the pattern is completely transferred from the foil onto the plastic surface.
Characteristics:
Advantages: Exquisite patterns, true-to-life colors, capable of achieving photographic-quality complex effects (holographic, metalic, etc.) ; multiple colors can be transferred in a single step, offering high efficiency; good adhesion and high durability.
Disadvantages: Requires the production of a transfer foil, making it costly for small batches; has certain limitations on the curvature of the surface.
Applications: on smooth cylinder packagings like cream jars, lotion bottles, lip gloss tubes, liquid lipstick tubes, mascara tubes, eyeliner pens, etc.
3. Digital Printing (UV Inkjet)
Theory: A computer sends graphic information to an inkjet printer, which directly jets UV-curable ink onto the plastic surface. The ink is then instantly cured by exposure to ultraviolet light.
Characteristics:
Advantages: No need for printing plates, short preparation time, highly suitable for small batches and personalized customization; non-contact printing is friendly to fragile surfaces; capable of printing high-precision gradients and complex patterns.
Disadvantages: Higher production costs for large batches; requires high standards of surface preparation; outdoor durability may not match that of traditional processes.
Applications: multiple or gradient color printing on skin care and makeup products.
4. In-Mold Decoration (IMD)
Principle: This is a cutting-edge technology that integrates printing with injection molding. A pattern is first printed onto a special film. This film is then placed into an injection mold. During the plastic injection molding process, high temperature and pressure fuse the film integrally with the plastic component.
Characteristics:
Advantages: The pattern lies beneath the product surface, making it extremely wear-resistant, corrosion-resistant, and seamless to the touch; allows for complex three-dimensional texture effects; the production process is highly automated.
Disadvantages: High costs for molds and films; technically challenging; only suitable for very large-volume production.
Applications: high-end, luxurious skincare and makeup products in large quantities.