The overall quality of a toner model determines the following six main factors: blackness, bottom ash, waste powder rate, resolution, fixing, ghosting. These factors are interrelated and influence each other. The reasons for influencing these factors are explained below.
The calculation of the blackness value is that the blackness tester firstly emits a certain amount of strong light beams, shoots on the pattern to be measured, reflects back to the blackness tester, calculates the absorbed light beam, and then obtains the fixed calculation program The value of. The main purpose of laser printer design is for office, so the average black value of its OEM is generally around 1.48. We generally think so, print darker,toner better. However, sometimes other factors such as toner may also cause this illusion. For example, the fixing of the toner is poor, and it is only adsorbed on the surface of the paper without penetrating into the paper fiber. At this time, most of the toner particles on the surface of the paper accumulate The surface of the paper, the absorption rate of light is very high, giving a very dark feel. But in fact, the high melting point of this toner, print the words are not strong, not a good toner.
The value of bottom ash is the blackness value at the blank with no words printed on the black proofing tester. It is also related to the white degree of printing paper, that is, the same kind of toner on different printing paper bottom ash value is not necessarily the same. Under normal circumstances, OEM toner bottom ash value of about 0.05 ~ 0.06, greater than 0.06, the visual results will feel the print sample a little dirty. The bottom of the impact of the main reasons for the value of toner and the conductive properties of carbon powder (referred to as electrical) and toner particle size.
The waste powder rate
Waste toner rate refers to the amount of waste toner that a given amount of toner produces in normal printing. Toner production, the various ingredients by a certain percentage of joined together, and fully stirred, the corresponding treatment, and then grinding. In this process, there is no guarantee that the thickness of each toner particle and its main ingredients carbon powder, iron powder, the same proportion of resin, only within a certain range of proportion. Beyond this range, the toner particles may become waste toner. Toner waste toner rate between 5% -7% is within the normal range. The amount of waste toner also has a direct impact on the number of pages printed on a given amount of toner.
Resolution ratio is the dot (DPI) that can be printed per inch. Toner particle size will have a direct impact on the resolution. We can print some small strokes to visualize whether it is fuzzy, to determine the resolution of high and low. You can also observe whether the lines flash, Chinese characters in the corner is broken angle and whether there is empty hair and other phenomena assessment.
Fixation refers to the ability of the toner attached to the surface of the paper to infiltrate into the paper fibers after melting. Melting point is an important factor affecting the carbon fixation. When the melting point is too high, when the paper with toner particles passes through the fixing assembly and has not sufficiently melted and infiltrated into the paper fiber, it has passed through the fixing assembly.