Iron oxide brown (FEPREN HM 470A, Czech Republic; BAUCOLOR 686, Poland) is used in the construction industry for painting concrete, paving tiles, roofing tiles, artificial stone.
The recommended percentage of colouring pigment is 2–5 % of the weight of the binder (cement) and depends on the desired colour of the product, as well as economic feasibility. An increase in the amount of pigment in concrete to more than 5 % may result in excessive content of fine fraction, higher water requirement of the concrete mixture and deterioration of the technological properties of concrete (lower strength, frost resistance, etc.).
Packaging: 25-kg paper bags