GB/T 4737-2020Test method for osmosis of daily-use pottery (English PDF)

1 Scope

This standard specifies the principles, equipment and utensils, sample preparation, test procedures, result expression and test methods for determining the permeability of daily pottery:

experiment report:

This standard applies to the determination of the permeability of daily pottery products: Other types of pottery products can be implemented with reference to this standard:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article

Pieces: For undated references, the latest version (including all amendments) applies to this document:

GB/T 3303 Terminology for defects of household ceramics

GB/T 5000 Terminology of Daily Ceramics

GB/T 6682 Analytical laboratory water specifications and test methods

3 Terms and definitions

The terms and definitions defined in GB/T 3303 and GB/T 5000 apply to this document:

4 Principle

Permeability is characterized by the initial time for the sample to penetrate water under water pressure:

5 Equipment and utensils

5:1 Drilling sampling machine: equipped with Phi50mm, Phi25mm diamond sampling bit:

5:2 Surface grinder or surface grinder:

5:3 Electric heating drying oven: working temperature (110±5)°C:

5:4 Permeameter: The schematic diagram of the measuring device is shown in Figure 1: The highest test water pressure is 1:0MPa, the accuracy is 1%, and the water outlet aperture of the measuring head is Phi5mm:

Phi50mm, Phi25mm cylinder (or piece) sample holder:

5:5 Vernier caliper: accuracy of 0:02mm: