Farbmeßgeräte für transparente Flüssigkeiten sichern die Qualität in der chemischen Industrie – Qualitätskontrolle an transparenten Flüssigkeiten

Colour Measuring Instruments for Transparent Liquids Safeguard the Quality in the Chemical Industry – Quality Control of Transparent Liquids In many areas of the chemical industry a complete product specification comprises – besides various other parameters – the colour characteristics as well. The colour of transparent liquids is still frequently determined by visual comparison of the product with e.g. iodine, Hazen- or Gardner colour standard solutions or appropriate colourfilter discs. In 1989 a new DIN 53995 standard for instrumental colour assessment of transparent liquids was introduced to replace the error-prone, subjective methods of visual comparisons. Dr. Lange GmbH, Düsseldorf, has developed the LICO 200 spectrophotometer under consideration of the new DIN 53995 for objective colour assessment in compliance with the iodine, Hazen and Gardner colour scales.