Bayferrox inorganic pigment is directly added and mixed into concrete for coloring. It is therefore different from the method of painting surfaces in that there is never any cracking or discoloration caused by heavy rain or sea water. This allows a more natural appearance since the concrete is colored while maintaining its original texture.

Bayferrox is a pigment that is easily dispersed into the water for kneading so that it can be well mixed into the cement powder.

They are not affected by the high alkalinity of cement and thus there is no color change or discoloration.

They are stable when exposed to sunlight and ultraviolet rays (photoresistant) as well as other environmental conditions such as rain, wind, temperature etc. and so color changes and discoloration do not occur.

They do not react with cement and so they do not affect the strength of the concrete. There is also little reduction in workability and thus they are easy to use.

They are manufactured using unique methods and excellent quality control and so high quality can be stably obtained. Also because the tinting strength of the pigments is high, the amounts used can be low.

*The amount of pigment added is an additional 5% of the quantity of cement per unit of concrete.

Firstly there are blacks, browns, reds and yellows Bayferrox organic pigments as well as luxurious colors such as blues greens and whites.
The photos below show the difference in shades when regular Portland cement is used for blocks in which the amount of cement added is changed from 1-9% (of the cement amount). Color cards and color triangles are also available.

In concrete to which Bayferrox has not been added, color changes with the passage of time. This occurs for the following reasons.

1 Efflorescence

The level of brightness changes with time

2 Scaling

After a number of years, the aggregate becomes exposed and the overall color of the concrete changes due to the color of the aggregate.

3 Concrete Yellowing

This phenomenon occurs because of different reasons which affect each other. However, this does not cause color changes in colored concrete. For regular concrete to which no pigments have been added, there is a remarkable difference in color in concrete that has not been exposed to the outside. That is to say, by coloring concrete, color change due to exposure can be controlled to some extent. The photos below show a comparison of concrete to which pigment has been added that was exposed outdoors for 45 months and that which was not exposed at all.
This sufficiently proves that Bayferrox and Chrome Oxide Green have excellent weather resistance (light stability).
In addition, although they are not shown here, lightfast pigments and titanium white (white pigment) also obtain the same effect.

Bayferrox covers almost all inorganic pigments that can be used for coloring concrete. Organic pigments cannot be used for concrete coloring. Some inorganic pigments such as cadmium pigments, chrome oxide pigments and iron blue and the like are not suitable for concrete coloring

If Bayferrox gets into the eyes wash well with pure water.
If Bayferrox contacts the skin, wash with soap and rinse.
If Bayferrox is swallowed, wash mouth with water repeatedly.

Do not store in wet or humid places

Ingredients: FeOOH (yellow), Fe2O3 (red), Fe3O4 (black)

·Official Filing Numbers (Law concerning the Evaluation of Chemical Substances and Regulation of Their Manufacture, etc. and Occupational Health and Safety Law)

Bayferrox is not classified as an acidic substance, an acutely toxic substance, or any other kind of toxic substance based on the hazardous and toxic substance identification according to the laws of Japan. On the international level also, it is not identified as a hazardous or toxic substance according the United Nations treaty or by the laws of other countries abroad.

Fish toxicity- Fish type: Goldenorfe (type of dace)
LCO:  Greater than 1000 mg/L

Acute oral toxicity: tested in rats
LDO: Greater than 5000 mg/kg