GB/T 4893.5-2013Test of surface coatings of furniture - Part 5: Determination of thickness (English PDF)

4.1 Sample size 250mm × 200mm

After finishing the sample shall not be less than 15 °C temperature environment placed ventilation after 7d experimenting. May also be in the rear has been completely dried finished furniture directly tested.

4.2

specimen surface should be smooth, no bubble, scratches, faded, wrinkled skin and other defects.

5.1 Pretreatment

Before the test, the sample should be at a temperature of 20 °C ± 2 °C, relative humidity of 60% to 70% for pre-processing 24h.

5.2 Test Point

From the edge of the sample within the range of not less than 50mm, and take three pilot sites in different locations or in different directions Determination of film thickness.

5.3 Calibration equipment

Accordance with product instructions, first in the known thickness of the film (reference) on the accuracy of the calibration of ultrasonic coating thickness.

5.4 Thickness Measurement

After calibration verification equipment in accordance with 5.3 qualified, in order to use ultrasonic thickness gauge.

On the film surface to be tested, special coating coupling agent were measured. For smooth, smaller film thickness may be used distilled water

The coupling agent.

The ultrasonic thickness probe placed on the surface of the film samples were measured, and maintain a constant pressure. Maintained during the measurement probe […]