What is Screen Printing?
Basically, Screen Printing is a kind of printing method applied in print media. it was started first time in China.
It is a very easy and low-cost method priced on volume printing of opaque colour printing, with the help of making a mesh of polyester/nylon synthetic cloth.
A mess is made, on required area to be print and stretched over the frame tightly either wooden or aluminium frame keeping standard depth at least 1”-1.5” to keep ink inside frame properly and known as silkscreen, thereafter kinds of concentrate liquid (Emulsion) potassium dichromate is applied on the screen to block the screen mess, after making silkscreen have to prepare artwork which has to get print.
How Does Screen Printing Method Work?
- Chemical diluter
- Rack to dry up
- Table with screen attachment
- Tube/Bulb 2000 watt
- Film and Vamulsion
- Nylon or polyester cloth
- Film exposer instrument
There are 3 types of Screen Printing
- Flat Printing
- Round Printing
- Rotary Printing
In flat printing, every thin or thick can be print flat items except as well as paper, cardboard, t-shirt, wedding card, plastic panel, aluminium panel etc.
Round stuff, as well as the bottle, pen and all cylindrical items, are printed in round printing Only one colour can be print at a time in this method. To add more colour required a separate screen.
There are various types of ink used in different types of object. Some of them are water soluble and some are toxic chemical based
1 PVC Ink
2. Vynoshine Ink
3. Gloss Ink
4. Plastisol ink
5. Water soluble ink
All these ink are used specialised for textile, paper, metal and non-metal object to get the best silk printing result point view of longevity and price. . For textile printing, water-soluble inks are used.
How to Set Up to Screen Printing?
First of all a design is made through handmade or computer then get printed on tracing paper, Keep mind you want to print design you made on tracing paper must be black colour, An Emulsion is made with potassium dichromate chemical ration of 20: 1 is applied on frame with the help of squeezed and kept it dry in dark room till dry out properly, thereafter you have to keep tracing paper on the screen already made, keep mind it must be airless between screen and tracing paper while you are going to expose in sunlight to transfer artwork onto screen and wash it quickly in the water. It happens that area you want to print became unmasked (washed out ) and another masked (Became harder) so the screen is ready to print. ink passed through an unmasked area with the help of squeezed and rest area remains as per remain substrate colour.
keep on screen and expose in the light for the specific required time, are covered with artwork (Text or image required to print) come into the expose that totally washed out from water force. And remain area (out of text and image) became harden. So the screen is ready to use. Object what have got to print keep beneath the screen and apply ink pressure by rubber on the frame and typically ink pass out on the object in the layer of ink you required so final print is ready. If the design you want to print more than one colour you have to make each separate silk screen.
Screen Printing on Fabric
Screen Printing on Fabric depends on colour fabric light or dark according choose cloth no as 50 on the ward where 50 stands for threads per inch darker threads lower no to get the best opaque colour
Printing on Paper and Cardboard
Screen printing V/S offset printing :
- Low processing cost
- No boundary of stuff thickness
- Minimum turnaround period
- Printing stuff odd and even
- Per unit low cost
- Image and content printing low quality
- Very slow printing speed
- Limited size print-ability
- Very difficult to match the registered colour
- Colour Consistency unequal
Finally, we came to know that the screen printing method is a very short process only a single opaque colour can be printed at a time, make more colour you required to do again and again. even it may be round, curved, even or odd surface for low volume printing. The printing substance has a large variety. Visiting Card, Envelope, Letterhead, T-shirt, Invitation Card and many more items can be printed at economical rates.Click here