Bayferrox - Outdoor Exposure Test Method

Weather stability of a pigment used in coloring material for construction can only be tested using the outdoor exposure test. Lanxess has been carrying out systematic tests on construction material products for 25 years at the Crefeld exposure site.

In order to test the weather stability of Lanxess inorganic pigments (Bayferrox, Bayeltitan, Chrome oxide green and lightfast pigments), concrete roofing tiles, masonry blocks, paving blocks, calcium silicate bricks, and spray mortar are manufactured under actual manufacturing conditions or conditions close to manufacturing conditions and subjected to the exposure test for a long period of time. Performing the test over many years reveal that colored construction materials into which the pigments have been incorporated are of excellent quality.

1 = 5% Bayferrox 920 2 = 5% Bayferrox 120 3 = 5% Bayferrox 160 4 = 5% Bayferrox 686 5 = 2.7% Bayferrox 110 6 = 5% Bayferrox 663 Test Specimen: Masonry block Prior samples have not been subjected to the exposure test Exposure test started: 1970 Photo taken: 1995

1 = 1% ChromoxidGN 2 = 1% Bayferrox 920 3 = 1% Bayferrox 960 4 = 1% Bayferrox 110 5 = 2% Bayferrox 660 Test Specimen: Calcium silicate brick Prior samples have not been subjected to the exposure test Exposure test started: 1970 Photo taken: 1995

1 = 5% Bayferrox 318 2 = 3.5% Bayferrox 320 3 = 2.8% RuB1-CarbonBlack1 4 = 1.2% RuB2-CarbonBlack2 5 = 1.7% RuB3-CarbonBlack3 Test Specimen: Masonry block Prior samples have not been subjected to the exposure test Exposure test started: 1970 Photo taken: 1995

1 = 3% Bayferrox 303T 2 = 1.1% RuB1-CarbonBlack1 3 = 0.5% RuB2-CarbonBlack2 4 = 0.9% RuB3-CarbonBlack3 5 = 0.5% RuB4-CarbonBlack4 Test Specimen: Calcium silicate brick Prior samples have not been subjected to the exposure test Exposure test started: 1970 Photo taken: 1995