How to Mark JPG Photos With a Laser Marking Machine?

in FAQs about Laser Marking, , ,

Laser marking for JPG bitmaps greatly tests the operator’s software familiarity and control of material properties.

The most common application of laser marking for pictures is mostly to print vector graphics. Vector graphics are graphics composed of closed curves such as points and lines drawn with CDR, CAD, and other drawing software. They are not distorted as the graphics are enlarged or reduced, and have nothing to do with resolution. Laser marking for this kind of graphics can better control the effect.

Bitmap images, also known as raster images, are composed of individual points called pixels. When the bitmap is imported into the marking software, the marking software will disperse the image into points of similar resolution according to its calculation function to control the laser marking machine to complete marking.

How to Mark JPG Photos With a Laser Marking Machine?

How to set parameters for the laser marking software? Here is the most commonly used EzCad2 software as an example:

Step 1: high-definition pictures

First, prepare a high-definition photo (the pixel of the photo is too low to produce a good effect), import it into the Ezcad2 laser marking machine software, and then set the relevant parameters.

high-definition pictures

Step 2: Fix the DPI value

The higher the value of the DPI setting, the better the marking effect and the slower the marking time. The commonly used setting values here are around 300-600, of course, higher values are also possible.

Fix the DPI value

Step 3: Set photo parameters

Set photo parameters

In most cases, it is necessary to set the Invert and Dither for the photo (there will also be cases where the Invert is not selected, but it is necessary to set it under normal circumstances).

Here we need to know that the laser vaporizes the color of the material surface, either to form a dark color or to expose the color of the material underneath the surface material. We must first determine the characteristics of the material. For example, the black metal business card I want to print now has black paint on the surface. After laser marking, it will be a silvery shiny metal color underneath.

So, if it is a material with color, check the Invert, such as a blue aluminum alloy phone case or a nameplate. If it is a material without color, such as natural steel, uncheck Invert.

Enter the Extend, and check the Lighten. The Contrast adjustment is to control the ideal marking effect of the photo, the white area is not marked, and the black area is marked.

Scan Mode, here the Drill Mode is usually set to 0.5. The Bidirectional scan is generally not recommended. It is too slow. It is not necessary to select Pixel power adjust.

Step 4: Set the power

Set the power

In the right Mark parameter, speed is set to about 2000, the power is about 40 (the power is determined according to the material of the product, the power of 40 is set here for reference, and the power can be set higher if the phone case is marked.), the frequency is about 30. The higher the frequency, the denser the dots come out of the laser.

Related: How to adjust the power and frequency of a 20W laser marker for marking deeper?

How can the laser marking machine mark the photos more clearly?

Normally, the higher the pixels of the selected image, the better.

DPI value is the key. To set the appropriate DPI value, generally 100~500. The larger the DPI value, the smaller the laser spot, and the finer the picture.

The power of the laser should also be set appropriately. The laser power is too high, and the image is whitened. The laser power is too small, the image is too dark, and more experiments should be done according to the actual effect.

Related: How to generate and print a QR code with Ezcad2?


The laser marking machine is not a printer. The making of the picture is according to the resolution. The darker part of the picture is marked with a darker color, so not all photos can be marked.

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