Elrepho 071 Lorentzen & Wettre Paper Spectrophotometer with Measurement Table

The ABB / Lorentzen & Wettre Elrepho 07x / 07xE Series Paper Spectrophotometers are the paper industry's own spectrophotometer. It measures colour, brightness, opacity and whiteness of paper, paperboard, tissue, pulp, coating inks and fillers. The visual appearance for a printed product is of crucial importance and is expensive to achieve. The ABB / Lorentzen & Wettre Elrepho 07x / 07xE Series Paper Spectrophotometers automatically measure according to the conditions specified by the user, e.g. D65 illuminant, C illuminant, or a 420 nm cut-off filter.

The ABB / Lorentzen & Wettre Elrepho 07x / 07xE Series Paper Spectrophotometers are designed to make laboratory work easier. A sample is placed on the measurement table, and then automatically positioned against the instrument's measurement aperture. For opacity measurements, the black cavity is controlled automatically. In fact, the measurement software controls everything

L&W Colour-Brightness software, is optimized for shift testing and has complete user interfaces for identification, measurement, and reporting. Grades with limit values and target values can be set as required. The software reports most optical characteristics. Calculations can also be implemented to meet the user's needs.

The software automatically measures according to the conditions specified by the user, e.g. D65 illuminant, C illuminant, or a 420 nm cut-off filter. Measurement results can be copied to other programs by a simple copy and paste function. Alternatively, data can be saved in an Excel compatible file. Sample identities can be retrieved from (and measurement results sent to) other databases using standard commands and tools.

Residual ink measurements of recycled pulp and paper are made on a sheet and opaque pad according to the ISO 22 754 and TAPPI T 567 standards respectively. This measurement can alternatively be made on an opaque pad only. This latter method is not standardized. An alternative is to measure the ink elimination between two process stages with the INGEDE method.

The program features a number of ways to display the results graphically. The trend diagram is used to monitor the production over a longer period, while the L*a*b* plot shows the colour coordinates for a series of samples. The reflectance curve provides important information about colour dyeing and the fluorescence of the sample.

The ABB / Lorentzen & Wettre Elrepho 07x / 07xE Series Paper Spectrophotometers have been manufactured with with traceable calibration in accordance with the ISO's hierarchy for photometric calibration and UV calibration at level C and D65. The software has an easy function for checking the calibration, or making a new calibration, when necessary. A large number of reference and working standards, with target values can be stored.