How to judge the quality of toner powder

The quality of toner powder has a significant impact on printing.

Poor-quality toner powder can affect the print quality, and even damage the components of the printer.

So, how can we distinguish the quality of toner powder when buying toner powder or refilling?

Here, Ruiming Office will tell you that the quality of toner powder can be viewed from these five aspects.

Blackness, Bottom ash, Waste toner powder rate, Resolution, and Fixation.

1. Blackness

Does it look familiar? Yes! You can often see the word blackness on the product details page!

The calculation of the blackness value is that the blackness tester first emits a certain number of strong light beams, which are shot to the pattern to be tested, and then reflected back to the blackness tester, and the absorbed light beams are 

calculated, and then the value is obtained through a fixed calculation program.

Under normal circumstances, the average blackness value of toner powder is about 1.45 to 1.50.

2. Bottom ash

The bottom ash value is the blackness value of the blank space without words in the printed sample tested by the blackness tester.

What can be called "bottom ash"? That is, when there is no text, the originally white blank background appears gray.

The reason for this is mainly related to the conductive properties and particle size of the toner powder. The stronger the conductivity and the finer the particles, the easier it is to produce bottom gray.

3. Waste powder rate

The waste powder rate is easy to understand, which is the proportion of unusable waste powder in the entire toner powder.

If the waste powder rate is low, more pages can be printed; if the waste powder rate is high, fewer pages can be printed. Among them, the standard waste powder rate is generally 5%-7%.

4. Resolution

Resolution refers to the dots that can be printed per inch (DPI). The thickness of the toner powder particles will directly affect the resolution. The finer the toner powder particles, the better the resolution.

Usually, we can evaluate the resolution of the toner powder by observing whether the lines are clear and sharp, whether the Chinese characters are smooth and without broken corners at the corners, and whether there are hollow phenomena.

5. Fixation

Fixation refers to the ability of the toner powder attached to the surface of the paper to penetrate into the paper fibers after melting.

The melting index of the toner powder determines the fixing firmness of the toner powder. toner powder with a low melting point will fix more firmly. However, if the melting point is too low, the stability of the toner powder will deteriorate; 

toner powder with a high melting point is more difficult to fix, and sometimes it will cause the fixing roller to stick.

In general, the melting point of toner powder is controlled between 180 degrees and 190 degrees, and the standard fixing firmness is above 90%.