Screen printing is a printing technique whereby a mesh is used to transfer ink onto a substrate, except in areas made impermeable to the ink by a blocking stencil. A blade or squeegee is moved across the screen to fill the open mesh apertures with ink, and a reverse stroke then causes the screen to touch the substrate momentarily along a line of contact. This causes the ink to wet the substrate and be pulled out of the mesh apertures as the screen springs back after the blade has passed.
It is also known as silk-screen, screen, serigraphy, and serigraph printing. One color is printed at a time, so several screens can be used to produce a multi-coloured image or design. Graphic screen printing is widely used today to create mass or large batch produced graphics, such as posters or display stands. Full colour prints can be created by printing in CMYK(cyan, magenta, yellow and black ('key')
Big order friendly: Since this is a method that requires the fabrication of screens for every color used in an artwork, it is best reserved for large orders. The more bags placed in an order, the cheaper the cost per unit will be.
Better Finish: Screen printing produces vibrant colors that are hard to replicate by other printing techniques
Versatile: Can be used easily on any surface as long as it is flat.
Durability: The results are long lasting.
Vibrancy: The more the pigments, the bolder and brighter are the colors.
Precision: Negligible smearing on knitted fabrics.
Not economical for small orders: As we already mentioned, screen printing needs more prep than other techniques before going into production. This doesn’t make it suitable for “on-demand” printing, which is the creation of a bag as soon as it is ordered.
The more colors, the more expensive it is: Turns out that having to create a screen for each color can be a bit of a hassle. Colorful designs complicate the process and make it more expensive, that is why it is better to keep designs for screen printing with as few tones as possible.