Compliance work

Overall migration Sensory analysis

Material analysis

Mechanical properties

permeation

PPWR/ Recycling

Colorimetric measurement, colourimetry (L*, a*, b*)

Measurement of colors, e.g. for evaluation of color deviations, color changes, for comparative measurements, etc. on films, granulates or flakes, articles, pastes, liquids, or others. Possible parameters: Measuring area 3- 25.4 mm, light type D 65 or D 50, measuring geometry d8, observer 2° or 10°- depending on the task and the test standard to be fulfilled.

In short — AI-generated

Colorimetric measurement determines the precise color values of materials such as films, granulates, or liquids using standardized light sources and optical sensors. The device captures the color coordinates L*, a*, and b* to objectively quantify the spectral properties of the sample surface.

The resulting values allow for the precise calculation of color deviations and the comparison of samples against defined standards or target values. In practice, this ensures consistent color quality across production batches and helps evaluate color changes caused by aging, processing, or contamination.

Text is AI-generated; based on test method data curated and verified by Innoform.

Test Method Group: optical tests

Norms:

Required Sample Amount: liquids, pastes, granulates, flakes: min 100 ml, sheet materials: min 5 x DIN A 4

Standard Tests

Colour measurement on liquids, pastes, etc.

Specific Norm: DIN 5033-1

The method is used, for example, to evaluate the color perception of liquids, pastes and similar materials. One application is, for example, the evaluation of the discoloration of washing solutions from cleaning processes for PET recyclates (bleeding). Here, color measurements are used to document the effects of packaging design on PET recyclate, e.g. with regard to possible bleeding of printing inks from label materials into PET.

Colour measurement on films, printings, etc.

Specific Norm: DIN 5033-1

The method is used, for example, to evaluate the matching of colours or colour changes. Here, the deviation from a defined standard, which is called Δ E or ΔL*,Δ a*,Δ b* for the three individual colour axes, is usually of interest.
« Back to overview