AS ISO 10545.1:2020 pdf download.Ceramic tiles Method 1: Sampling and basis for acceptance.
4 Constitution of inspection lots
An inspection lot can consist of one or more homogeneous consignments or subconsignments.
Any consignment which is not homogeneous shall be divided into subconsignments which are assumed to be homogeneous and which might then constitute inspection lots.
If non-homogeneity is not relevant to the properties to be tested, by agreement between the supplier and consumer, the consignment can be treated as homogeneous.
NOTE For example, a consignment of tiles, of the same type with different glazes, can be homogeneous with regard to dimensions and water absorption and non-homogeneous with regard to surface quality. In the same way, accessories which differ only in shape from the remaining tiles in the sample can be considered homogeneous with respect to the other properties.
5 Extent of the inspection
The choice of properties to be considered for inspection shall be subject to agreement between the supplier and consumer and might depend on the size of the inspection lot.
NOTE In principle, a complete range of tests has to only be executed for inspection lots of more than 5 000 m2 of tiles. Testing is usually not considered to be necessary for inspection lots of less than 1 000 m2 of tiles.
The number of inspection lots to be drawn for testing shall be subject to agreement between the parties concerned.
6 Sampling
6.1 The sampling location shall be subject to agreement between the supplier and consumer.
6.2 One or more representatives of each party concerned can be present at the time the sample is taken. Samples shall be taken at random from the inspection lot. Two samples shall be taken. It might not be necessary to test the second sample. Each sample shall be packed separately and shall be sealed and marked as agreed by the parties concerned
6.3 For each property, the number of tiles to be tested is indicated as sample size” in column
2 of Table 1.
7 Inspection
7.1 The tiles in the sample shall be tested according to the test methods specified in the relevant product standards.
7.2 The test results shall be evaluated according to Clause 8.
8 Determination of acceptability of inspection lots
8.1 Inspection by attributes
8.1.1 When the number of non-conforming units found in the initial sample is less than or equal to the acceptance number Aci, indicated in column 3 of Table 1, the inspection lot from which the sample was drawn shall be considered acceptable.AS ISO 10545.1 pdf download.