EEL 12M Opacimeter

A convenient, self-contained instrument for measuring the percentage opacity and whiteness of printing ink, paper and plastics in a research and production environment. Microprocessor comparison of the diffuse reflectance of the sample against black and white references to display opacity.

The EEL 12M Opacimeter is a convenient, self contained instrument for measuring the percentage opacity and whiteness of printing ink, paper and plastics in a research and production environment.

Microprocessor comparison of the diffuse reflectance of the sample against black & white references to display opacity.

Applications
Coatings, cosmetics, dyes, film, inks, paint, paper, plastics, packaging materials, sheet, varnishes and waxes.

Features
Easy to use, compact, microprocessor controlled, measures white and coloured film and measures whiteness.
Operation
The instrument is calibrated by placing a sample with a reference standard, over the sample port of the integrating cube and setting the unit to ready 100. The sample only is then measured against the black cavity, light reflected from the sample being integrated within the cube. The new reading is percentage opacity and is colour independent. Brightness as diffuse reflectance is measured similarly by utilising a white reference standard.

Range of Measurements

  • Opacity of paper, plastics or similar material, is the ratio of the diffuse reflectance measured when backed by a black material and by a white material.
  • Hiding power of a paint or coating – is the ratio of its diffuse reflectance with a black and a white backing. The paint can be applied to a card with black and white areas or the coating can be on a polyester foil/film and the measurements are made with a black backing and with a white ceramic tile.
  • Contrast Ratio – is the ratio of diffuse reflectance from two areas of similar colour.
  • Transmitted Opacity – is the total transmittance from two areas of similar colour.

Specification Standards

Opacity BS 3900, BS 4432; BS 6616; BS 7664; BS ISO 2471; ISO 2471; ISO 3905; ISO 3906; ISO 6504; ASTM D589; DIN 53146; TAPPI 519; TAPPI 1425
Hiding Power BS 3900; ISO 2814; ISO 6504
Contrast Ratio BS 3900; ISO 2814; ISO 3905; ISO 3906; ISO 6504

Specifications

Optical geometry 0 degree diffuse degree, Illuminant A or C tungsten source, detector CIE photopic
Sample port 25mm diameter Patch size 19mm diameter Warm up time 1 minute
Repeatability 0.1 unit Zero drift None Height 11 x 18 x 21 cm
Reproduceability 0.2 unit Full scale drift  Less than 0.1 in 5 minutes  Weight  2.5 Kg
Operating temperature 5 – 50 °C Power 110-230 VAC, 50-60 HZ Option RS232 Serial Port
Traceability National Standards NPL Electronics Autocalibrate microprocessor

For further information, please contact our Sales Team on 01223 492081 or via sales@tendringpacific.com