Generally speaking, the carbon black blackness index of carbon ink can be divided into four categories, and the blackness index is the relative branching measured by carbon black. It is used to disperse carbon black in heated linseed oil and utilize blackness. Measures the intensity ratio of the reflected light intensity reflected by the standard reflected light. If the blackness index is less than 70, we call it high-pigment carbon black, the index is between 70-80, we call it medium pigment carbon black, and the index is between 80-90 is ordinary pigment carbon black, the index is high It is a low-pigment carbon black at 90. It is not difficult to see that the smaller the blackness index, the higher the blackness.
Which pigment carbon black is used for carbon ink?
The morphology of pigment carbon black aggregates is crucial to the manufacture of inks. The more particles that make up the carbon black aggregates, the more complex the chain structure. We say that its structure is higher, and we call it high-structure carbon black, and vice versa. Of course, low-structure carbon black, high-structure carbon black has a large DBP value, and the carbon ink produced from it has relatively large viscosity, long wetting time and good dispersion ability, but has low blackness and low tinting strength. Low structure carbon black is more difficult to disperse due to greater absorption between carbon black aggregates, and because it has smaller voids and less air, it is easy to wet, low structure carbon black has fewer aggregates , and its blackness and coloring strength are high. In fact, no matter what type of carbon black is produced, its physical and chemical properties are related to the surface properties of carbon black particles, which has a certain impact on the performance of carbon black ink.
What is the difference between carbon ink and carbon black ink
Is carbon ink the same as carbon black ink? Many friends don’t understand this question. In fact, ink is used to write brush characters or paintings, while carbon ink is used on pens. Not only are the components different, but the usage is also different. different. Ink is a black lump made of soot or pine smoke, or a juice made from ink and water. The carbon ink is made of graphite particles mainly composed of carbon molecules. Ink is easy to dry, carbon ink is not suitable.