Brightness
Coatings & Industry > Brightness GLoss & Chalking
Brightness Measuring Instrument TINT TESTER 527
The TINT TESTER 527 has been specially developed for measuring the brightness of dark pasty test coatings (e.g. applications of pigment pastes for determining the tinting strength according to ASTM D 3265 and ASTM D 2745).
This model also enables standard brightness values to be measured on solid samples (lacquer layers, paper, plastic surfaces, etc.).
The TINT TESTER consists of the stationary mains-powered supply unit with 4½-digit LED display and the portable brightness measuring head TINT SENSOR Y.
Norms
- ASTM D 3265
- ASTM D 2745
Design and function
The TINT TESTER 527 consists of a stationary, mains driven power supply and display unit (with digital display for a range from 0-199.99) and the portable TINT SENSOR Y degree of resolution.
TINT SENSOR Y:
The TINT Sensor incorporates the 45°/0° worldwide standardized measuring geometry with light source C illumination.
The spectral response of the light sensing photocell is corrected with an especially selected Y filter so that the measuring values correspond with the brightness sensitivity of the CIE-2°-standard observer.
An adjusted and optimized lens system is part of the light transmitting and sensing optics to guarantee homogenous illumination of the specimen surface as well as a defined reception of the remitted light.
Because of this, the results of measurement are highly reproducible, free of drift and according to specifications.
The opto-electronic system of the measuring head is insensitive against external disturbances due to the integrated pre-amplifier.
It is possible to set the amplification within a wide range so that the measuring range of the instrument can be adjusted to the actual measuring problem to get optimum results.
Two transverse support ledges 8 mm wide and at a pitch of 80 mm integrated with the undersides of the measuring head, keep the measuring head away from the specimen so that measurements on coatings in the form of pastes are possible: the ledges prevent damage to the specimen and contamination of the measuring head.
The gap between the measuring head and the specimen is 0.5 mm. It is thus possible to measure tint strength of freshly applied coatings with a wet film thickness of approx. 400 µm whilst extraneous light is totally excluded.