specializes in research & development and production of Carbon Black

Beilum Carbon Black Pigment-Questions and Answers on Basic Knowledge

  1. Is carbon black pigment hygroscopic?

Carbon black will absorb moisture until an equilibrium value is reached.

  1. What are the decomposition conditions of carbon black ?

Generally, carbon black will decompose in air or oxygen between 450℃~500℃.

  1. What is the shelf life of carbon black pigment ?

When stored under ambient conditions, carbon black is not susceptible to decomposition and its shelf life is not limited. Over time, carbon black will absorb moisture until it reaches an equilibrium value, if moisture affects it.

  1. How does carbon black pigment participate in electrochemical reactions?

Because carbon black is conductive and has relatively low resistance, it can be used in electrode assemblies used in a variety of redox equipment.

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  1. How does carbon black pigment achieve the hiding power of products?

Carbon black pigment is an excellent opacifying agent. This property is derived from the ability of carbon black to absorb radiation in the visible light spectrum. This excellent absorption capability greatly reduces transmitted and reflected light.

  1. How does carbon black pigment stabilize ultraviolet rays?

The UV stability properties of carbon black are achieved by its UV radiation absorption capacity and backscattering efficiency. Backscattering efficiency refers to the ability of a particle to redirect incident light to other absorbing particles or to return incident light in its direction.

  1. What is acetylene carbon black?

Acetylene carbon black is produced through the exothermic decomposition reaction of acetylene. Therefore, it is very pure carbon black. It is the closest to graphite of all carbon blacks and is often used to provide electrical conductivity.

  1. What is liquid toner?

Liquid toner is a colloidal hydrocarbon dispersion of dyed, charged resin particles. The imaging mechanism is therefore similar to electrostatic imaging using dry toner-based systems. Liquid toner particles are smaller than dry toner particles, allowing higher resolutions and higher-quality color images to be produced.

  1. What is lamp black ?

Lamp black is produced through controlled thermal oxidation of coal tar. These carbon blacks are characterized by a broad particle size distribution. Currently, most lamp black production has been replaced by the furnace black process, except for very large particle size classes.

  1. What is the bulk density of carbon black pigment ?

Based on the structure and physical form of carbon black, the volume density of carbon black varies greatly among various grades of carbon black. Due to the presence of enclosed air, the bulk density of carbon black is lower than the true density (specific gravity) of carbon black.

  1. What is the thermal conductivity of carbon black?

There are few existing data on the thermal conductivity of carbon black. Studies on the thermal conductivity of rubber compounds containing carbon black versus rubber compounds without carbon black have shown that carbon black increases the thermal conductivity of rubber products.

  1. What is the particle size of carbon black aggregates?

The particle size of carbon black aggregates depends on the grade of carbon black, and each grade of carbon black has its own average aggregate particle size. The average aggregate particle size typically ranges from 0.01 to 1.0 μm.

  1. What is thermal carbon black?

Thermal carbon black is produced through the thermal decomposition of natural gas. These carbon blacks typically have very low surface area and structure.

  1. What is tinting strength?

The coloring strength is based on the reflectance measurement of the slurry composed of carbon black and zinc oxide in the oil. It is a measure of carbon black’s ability to reduce the amount of reflected light. Higher tinting strength can be obtained by reducing the particle size of the primary particles.

  1. What is surface oxidized carbon black pigment ?

Some grades of carbon black have been post-treated (chemical oxidation) to increase the amount of chemical adsorption of oxygen on their surface. In certain end applications, this improves carbon black dispersion and dispersion stability and reduces product viscosity.

  1. What is the structure of carbon black pigment ?

Aggregates of carbon black are formed by the fusion of smaller units called primary particles, forming three-dimensional branched structures or clusters. This fusion is controlled by the reactor, resulting in varying degrees of clustering. Pigment Carbon Black grades that allow the particles to agglomerate to form relatively large and complex aggregates are called high structure grades. The level at which aggregation range is minimized is called a low structure level.

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