The subject of this specification, in addition to the data given, are the test methods by which the data have been determined. The test methods can be received if desired.The following notes briefly describe the test and assessment conditions. In other test media and/or under other test conditions, these values might differ. Please take information about characteristic fastness values for the product (lightfastness, heatstability, etc.) from the pattern cards. These values are not subjected to routine checks.
The above-mentioned pigment is an organic colorant for the plastics industry. Standardisation has been designed accordingly.
Note on 2 - Colour properties
Testing of the colour properties is carried out in accordance with the test method no. 4/3 "Testing in plasticised PVC", in comparison with the standard quality of the product.
The assessment of the opaque coloration is carried out colorimetrically. The relative tinting strength is determined by means of the weighted K/S-sum. The residual colour difference after strength adjustment is divided - in accordance with the CIELab-formula (DIN 6174, ISO 7724-3) - into the lightness-contribution ΔL, hue-contribution ΔH, and chroma-contribution ΔC. The tinting strength is given as relative tinting strength, compared to the standard.
The assessment of the transparent coloration is carried out visually.
Note on 3 - Fastness to bleeding
0.1 % transparent colorations are heated, using the sandwich method between two white films with a low pressure for 2 hours in the drying cabinet to 140 °C (test method 4/3). The fastness to bleeding of the pigment is assessed by the degree of staining of the white contact film in comparison to the standard.
Note on 4 - pH value
An aqueous pigment slurry containing 5 % pigment is filtered and in the filtrate pH value is measured at room temperature in accordanec with test method no. 1/9.
Note on 5 - Specific conductivity
An aqueous pigment slurry containing 5 % pigment is filtered and in the filtrate the specific conductivity is measured in accordance with test method no. 1/10. It is an indication of watersoluble electrolytes contained in the pigment powder.
Note on 6 - Volatile matter
According to test method no. 1/7 the percentage by mass of matter volatile from a pigment sample is determined at 105 °C by means of an IR lamp. The sample is being heated until it reaches constant weight (according to ISO 787-2).
Note on 7 - Sieve residue
Determination of residue on sieve according to test method no. 1/3 (DIN 53195, ISO 787-7). The mesh width of the sieve is 0.063 mm.