When you need to buy toner in bulk from China, you don’;t know how to differentiate the toner, or you don’;t see the difference between the different toners. If you also have difficulty identifying the toner’;s quality, then this article will tell you, and maybe it will help you in your purchasing plan.
We will compare the chemical toner with the physical toner. We will analyze from Blackness, The Bottom of The Gray, Waste Powder Rate, The Degree of Fixation, The Resolution , The Formation of Ghost Shadows, the six ways to help you to tell the quality.
Blackness
The blackness value is calculated by the blackness value tester first emits a certain number of solid light speeds, shot to the graph to be measured. Then, the blackness value tester calculates its absorbed light rate according to a fixed calculation program derived from the value.
Laser printers are mainly designed for office use. So their OEM average blackness value is generally around 1.48. And in my country, some models of printers are used out of film or sulfuric acid paper and other printing media. The fibers of these printing media have undergone special chemical treatment compared to ordinary printing paper. The resin in the Toner is more difficult to melt and penetrate the paper fibers. So the requirements for Toner are higher. We generally have a habit of thinking that the darker the print type, the better the Toner. But sometimes, other factors of Toner may also cause this illusion. Such as the poor fixation of Toner, which just adsorbed on the surface of the paper and did not fully penetrate the paper fiber. When the surface of the report, most of the toner particles are piled up on the surface of the paper, and the absorption rate of light is very high, giving the feeling of being very black. That is also why some users say that the printed samples do not need to be seen or touched by your hands to know whether they are black or not. But in fact, the melting point of this Toner is high, the printed characters are not solid, and is not a good toner. Of course, a high blackness value also has harmful effects. With a certain amount of Toner, the yield page is less in a specific average coverage rate.
The Bottom of The Gray
The bottom gray value is the blackness value of the print sample with a blackness value tester to test the blank space without words. It also has a specific relationship with the degree of white printing paper. Đó là, the same Toner in different paper printed on the bottom gray value is not necessarily the same.
The OEM toner bottom gray value of about 0.05 to 0.06 is more significant than 0.06. The results of visual inspection will feel like little dirty print samples. The bottom gray matter of the main reason is the conductive toner properties (referred to as electrical) and the size of the Toner. The stronger the electrical conductivity, the finer the particles, and the more likely to produce the bottom of the gray. Each model of printer requires the electrical properties of
Toner is generally not the same. In addition, the photoconductive drum surface of the photographic layer is caused
by leakage. It will also cause the bottom of the gray, which can also explain when the photographic layer is worn, the printed page in the broken will have noticeable black marks.
Waste Powder Rate
Waste powder rate refers to a certain amount of Toner in regular printing and the proportion of waste powder
produced. A specific ratio mixes toner in the production, a variety of ingredients, thoroughly stirred by the complementary treatment, and then ground.
Toner waste powder rate between 5% to 7% is the normal range. And the waste powder rate of chemical powder is 3%. It also directly affects a certain amount of toner printing page count.
The Resolution
It refers to the dots that can be printed per inch (DPI). The coarseness of the toner particles will directly affect the solution. We can publish some of the strokes of the small print to inspect whether it is blurred vision and to determine the resolution of high and low. You can also observe whether the lines have a burr. Whether the Chinese characters are in the corner of the broken intersection. Whether there is a hollow hair and other phenomena assessment. At present, the toner resolution of 300dpi, 600dpi, 1200dip, and the solution of 1200dpi in the HP1200 and HP4100 are two models of printers on the toner requirements are pretty high.
The Degree of Fixation
It refers to the ability of the Toner. Attached to the paper surface after melting and penetrating the paper fiber. Melting point is an essential factor affecting the toner fixation. The melting point is too high when the paper with toner particles through the fixing assembly, not fully melted to penetrate the paper fiber, has passed from the fixing assembly. But the melting point is too low, and the stability of the Toner will again become poor. When we test, you can touch the surface of the print graphics to feel its roughness so that the fixation is excellent or poor. Generally speaking, the surface of the printed text will be very rough for the Toner with poor adhesion. Strict test, you can use a specific tape to
stick to print graphics, and then uncover to detect changes in the blackness of the pictures.
The Formation of Ghost Shadows
Ghost shadow is due to the formation of text graphics on the photosensitive surface of the unequal charge area in the completion of imaging but still residual into the latent image of the charge area. So that in the following imaging, the latent image of the phenomenon is still visible. The electrical properties of the Toner directly affect the apparent ghost phenomenon. The ghost phenomenon is similar to the phenomenon of ghosting but is different from ghosting. Machine failure phenomena generally cause the ghosting phenomenon. Such as, the fixing assembly in the upper roller fluorine layer is destroyed, causing sticky powder, which leads to ghosting. In addition, the printing media will also affect the ghost phenomenon. Such as sulfuric acid paper than ordinary printing paper is more likely to appear ghost phenomenon. Just printed paper will also be more accessible than the new printing paper ghost phenomenon.
Phần kết luận
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