Delta has two laboratory structures responsible for serving the production of plastic furniture and the porcelain tableware segment. Each of them has two laboratories, one focused on raw material analysis and the other on quality analysis.
Through strength tests, the maximum permissible load for the diggers is defined: 154 kg for type A (Residential) and 182 kg for type B (Unrestricted Use). This classification occurs in accordance with Inmetro ordinance No. 166/2021 and ABNT 14776 standard for Chair Certification with the Product Certifying Body (OCP) and release of production batches.
This test consists of placing a load of 154 kg for class A and 182 kg for class B on the seat of the chair. The chair must withstand the load for a period of 30 minutes.
In this test, the chair receives 10 impacts of 68 kg at heights of 15.2 cm for class A (154 kg) and 20.3 cm for class B (182 kg).
The leg test consists of placing a load of 154 kg for class A and 182 kg for class B on the seat of the chair, with the front legs resting on a wood block with height ranging from 7.6 cm to 11.4 cm, depending on the opening between the chair legs.
The laboratory analyzes raw materials and monitors the preparation of input (ceramic slip, atomized powder and glaze) for porcelain products, in addition to providing support in the development of new raw materials together with the mining engineer. The tests in the quality laboratory have an investigative and scientific process nature and are not related to release from production processes.
Test performed to determine particle sizes of ceramic raw materials and suspensions (ceramic slips and glazes).
This test consists of simulating an impact on the lateral of the dish using a pendulum system with known mass and impact angle. This test is performed until a fault appears in the product.
Porcelain tableware has nearly zero porosity (0.5%), thus preventing the proliferation of fungi and bacteria. The greater the porosity of a ceramic, the more easily it will absorb external elements to which it is exposed, and the lower its durability. Stoneware tableware has porosity between 0.5-3%, and earthenware tableware has porosity greater than 3%.