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Unveiling the secrets of Electroluminescent Light Technology.

Nejilock has over 20 years of experience in Electroluminescent (EL) Light Technology. We have assisted many companies in setting up their own EL Factory. Your search ends here for expert guidance in crafting your Electroluminescent Light Panels!

Our comprehensive content will guide you through diverse techniques for producing EL Light Panels, detailing the necessary machinery and equipment, essential design principles, and intricate production procedures.

Discover the secrets behind Silkscreen Printed EL, Spray Painted EL, and Roll-to-Roll Slot-die-coated EL methods. Learn to design ink layers effectively and explore the machinery, inks, substrates, and inverters essential for creating stunning EL Lights.

EL Printing Machine
Large Format Screen Printer

What is electroluminescent (EL) light panel?

Electroluminescent Light Technology is a non-thermal generation of light resulting from the application of an electric field to a substance.

The EL Light Panel is created by the following steps:

  1. Printing Phosphor Ink over an Indium Tin Oxide (ITO) Substrate.
  2. Next, print the Dielectric Ink over the Phosphor layer.
  3. Finally, print Silver Conductive Ink to complete the structure.
  4. Complete the device by lamination.

There are a few ways to make Electroluminescent Light Panels. We will explain them one by one, continue reading, or contact us for more information.

Different Layers of a Electroluminescent Light Panel
Electroluminescent Light Panel Structure

Characteristics of an EL light Panel.

  • Flexible, made of Plastic.

  • Can be twisted, bent & cut into any shapes & sizes.

  • UV & Water Resistant.

  • Main Power or Battery Operated.

  • Low power consumption.

  • High visibility.

  • Light weight.

  • Non glaring.

  • Portable and easy to install.

Roll to Roll Electroluminescent Light Panel
Flexible EL Light Panel

SILKSCREEN Printed Electroluminescent


In Electroluminescent Light Technology, the Screen Printing is the most commonly used method of making the EL Light Panels. The reasons must be the availability of skilled workers, machinery, and supporting industries.

The process is similar to printing posters or textiles, except EL requires understanding the function of different ink layers and handling printing inks with bigger particle sizes.

You start by designing the printing layer for the inks to create the positive films. There is a layer each for the Phosphor, Dielectric, and Silver Inks. The designs will then be cast into Positive Films in-house or by a contractor.

Next is to get ready the screens. I recommend you do the screens in-house to control quality and cost. Due to the particle size and viscosity of the EL Inks, the mesh size and tension strength are different from normal printing inks. We recommend 100T-40 (250 mesh/inch) for all three inks and >20N/cm tensile strength for the screens.

Indium Tin Oxide Coated PET (ITO) is the most common substrate for screen printing EL. Cut the ITO to size according to the design. 

The Phosphor Ink has to be put on a roller a few hours before printing, this is to ensure the Phosphor particles and the binder are homogeneous.

Now, you are ready to print. 


This is the most common method used in making an EL Light Panel. As the name suggested, you will need a Screen Printing set-up. For those without, you will need the following:
  1. Screen Stretcher – for stretching the screen mesh.
  2. Exposure Machine – for casting the image from positive films to screen mesh.
  3. Screen Printer – for printing the various Electroluminescent Inks
  4. Box Oven – for curing the Inks, it takes a longer time to cure
  5. Conveyor Oven – for curing the Inks, it takes a shorter time to cure
Above are the primary machines that you will need. Depending on your budget, the machines can be manual or semi-automatic operation. The make of the machines also determines the cost of investment.

More Electroluminescent Light Technology updates coming

In order to serve you better, our team is diligently working to update contents related to Electroluminescent Light Technology. However, should you require urgent information before the updates are completed, please do not hesitate to contact us. We are always ready to assist you.