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PRINTING PROCESS

PRINTING PROCESS

Screen Printing

Heat Tranfer Printing

Digital Printing

When we printing our bags we use different printing methods depending on a various of factors type of bag, quantity of bag,and printing color are a few determining factors.Here are some brief explanation of the different processes .

Screen Printing

It’s the most common type of printing for fabric bags. it’s quick and cheap and has a great finish .we can print up to more than 4 colors as standard but it is possible to add more if needed.

How it works

Screen printing is very simple at its most basic. A fine silk mesh is stretched across a frame to make a screen. Thick ink is placed on top of the screen which is then positioned above the bag.A squeegee blade pushes the screen down onto the bag and slides across the screen.This pushes the ink through and it ends up on the bag.

In order to make images, you need to be able to block the ink from going through certain areas and allow it in others. This is controlled by a special photosensitive film. The artwork is split into separations, one for each colour. Each separation is then printed onto a film which is then treated. This treatment allows ink to pass through the printed parts of the film but not the rest. The film is then applied to the silk screens, one for each colour.

Next need a machine that can hold the screens in the right place so that they can be swapped around and still line up in exactly the same place above the bag. A separate ink is mixed for each colour and placed onto the right screen. One squeegee per colour later and you have a finished, multi-coloured print!

Heat Tranfer Printing

If you need fine detail and photographic images then heat transfers can be a great option. For larger runs, heat transfers can be a more time consuming process. But the great looking results mean it can be well worth investing in.

How it works

Heat transfers split the printing job in two. A large digital inkjet printer (just like the one you have at home!) prints your design to a special heat transfer material. This is made of two layers, a carrier and a heat activated glue.

The transfer is then cut to shape and a large, hot iron presses the paper onto the bag. The glue activates and the carrier paper is removed leaving the image stuck to the bag.

Because the ink is printed on an inkjet printer to paper, much more detail can be produced than when printing direct to the rougher cotton. The glue that keeps the image on the bag makes a stiffer, glossy patch on the surface. This can make the bag less flexible in printed areas and will show up as a shinier surface compared to the fabric.

Digital printing

Digital printing is the process of printing digital-based images directly onto a variety of media substrates. There is no need for a printing plate. Digital files such as PDF or desktop publishing files can be sent directly to the digital printing press to print on fabric.

Instead of using metal plates to transfer an image, digital printing presses print the image directly onto the fabric.

The LOHAS Team


Post time: Sep-22-2020

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