Inspection items

Quality inspection standards

Inspection items

Sand holes Bubble Pockmarks

Not allow

Visual inspection+steel tape measurement

Scratch

No obvious scratches allowed

visualization

Flaw

not allow

visualization

Chromatism

Color difference is not allowed for the same batch of slabs

Direct visual inspection under 600mm natural light

Miscellaneous cluster Chromophore

The impurity particles on the front side of particle slabs do not exceed the maximum particles in the slabs ≤1/m². Impurities over the largest particles are not allowed or impurities more obvious are not allowed

Visual inspection+steel tape measurement

Paste repair

Front side allows a small range of repair (such as less than 1mm of impurities or air holes), after repairing the slab flat, no colour difference and debris

visualization

Gloss

45-60 degrees

Glossiness meter measurement

Inspection items

Quality inspection standards

Inspection method

marking

Apply back marking and side labeling per customer requirements, with side labeling done manually using a red stamp. The inspector will ensure spray codes are clear and aesthetically pleasing. For special markings, ensure they meet customer specifications and remain intact and legible, with side codes neat and clear.

visualization

protective film

Qualified slabs shall be covered with a layer of special, the thickness of 8C PE film, dark-coloured slabs need to use low viscosity, and to ensure that the film viscosity is uniform.

visualization

Paper packaging

Ensure secure and gap-free fastening of slabs with wooden and steel nails during loading, protect with a raincloth, and use clean, flat transport vehicles to prevent damage from impact, temperature, and moisture, maintaining packaging integrity.

visualization

Glue accessories

Pack and store slabs according to customer requirements, ensuring they are placed in a designated flat area and wrapped with film to prevent damage and contamination.

check