Corraveni Bath | Sanitary Ware Professional

Successful Cases
How do Corraveni control the surface quality of ceramic toilet and washbasin?
Most foreign buyers care about: what level of surface quality can we expect if we buy from China ceramic toilets and washbasin products?  At present, there is not an universal or compulsory quality standard regarding the appearance quality control of ceramic sanitary ware. Different ceramic factories are using different interal standard. As a result, very often quality disputes arise because of the different understanding on surface quality between suppliers and buyers.
Corraveni has a complete range of quality standard on the surface quality control of ceramic toilet, ceramic washbasin and other ceramic sanitary ware products. By default, we make sure all of the exported toilets products compliant with our surface quality control standard. What's more, we lead the buyers to define their demand and make sure the quality can reach their expectation.
We generally classify the surface defects of toilets and basins into the following groups:
Cracks on ceramic
Cracking through the bowl of WC pan
Cracks on the surface of WC pan
Glaze crazing
Holes on ceramic
Pinholes
Dots on ceramic
Large blister, large spot, projection, discoloration
Blister, spot
Glaze bubble, speck
Other defects on ceramic surface
Wave  
Glaze bubbles
Glaze crawling, cut glaze
Chip, knocking
Scratched mark
excess glaze, orange peel, glaze sticking, body refuse, ash contamination, edge peeling, smoked glaze, dimple…..
Machining and Precision
Surface deform
Gap tolerance between different connecting parts

For every type of surface quality defects, we have clear standard and inspection manual to instruct the QC how to judge the grade according to the defect size and positions:
Here we attached some reference photos of typical surface quality defects and quality checking process:
Typical Surface Quality Under Strict Control
Toilet Surface Quality Control

Surface Area Classification
ceramic toilet area