Water Absorption Test - EN 997 Standard (EN_997.2)

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One-Piece and Two-Piece Toilets - Cistern

EN 997 Standard and Water Absorption Test

According to the clauses of this standard, the evaluation method is explained in section 5.7.3. The following materials and methods are used for the determination of water absorption.

Test Materials and Equipment

Balance (capable of weighing with 0.05 g accuracy)
Oven (capable of maintaining temperature at 105 ± 2 °C)
Desiccator (with freshly prepared silica gel)
Tongs
Boiling pot (with temperature control)
Demineralized water
Fine-tipped spatula
Fine brush

Test Method

3 samples are taken by breaking from the glazed surface of the toilet. The unglazed surface area of the samples should be approximately 30 cm², and the maximum thickness including glaze thickness should be approximately 12 mm.
Samples are dried at 105 °C for (180 ± 5) minutes.
Samples are cooled in a desiccator.
Each sample is weighed with 0.05 g accuracy; this mass is m₀.
Samples are placed into the boiling pot with the help of a fine-tipped spatula. Then, demineralized water is poured into the pot. It should be ensured that the samples do not touch the bottom or sides of the pot.
Water is heated to boiling point for (120 ± 5) minutes. Then, the heating process is stopped and the samples are left in the container for another (20 ± 1) hours.
Samples are immediately removed from water with the help of a fine-tipped spatula and dried by wiping lightly with tongs.
The depressions and holes on the sample are dried with the help of a fine brush.
Samples are immediately weighed; this mass is m₁.
The water absorption coefficient in percentage is calculated separately for each sample using the following formula: