Regarding the inspection and verification process for bathroom cabinets and kitchen cabinets, as well as the inspection and verification services for factories

October 13, 2025

Bathroom cabinets and kitchen cabinets are important functional furniture in the home space, and their quality directly affects the usage experience and service life. During the inspection, factory verification, and product certification processes of bathroom cabinets and kitchen cabinets, a systematic quality control system must be established. This article will comprehensively elaborate on the inspection standards, inspection methods, and quality certification requirements for bathroom cabinets and kitchen cabinets, providing professional guidance for relevant practitioners.
I. Inspection and Certification of Structure and Materials
(1) Wood and Moisture Content Control
Moisture Content Inspection Certification
The moisture content of the solid wood is strictly controlled within the range of 8% to 12%.
Different regions adjust the standards according to the climatic conditions.
The moisture content difference between adjacent panels is no more than 2%.
Wood defect inspection
No dead knots, rotten scars, insect holes, or obvious mineral lines
No burrs, no skipping of the knife, no sanding marks, no scratches or abrasions.
The filling marks are not obvious, which meets the surface treatment requirements.
(2) Wood veneer and panel certification
Quality inspection of wood veneer
No wormholes, no disordered flowers, no scattered flowers, no tiger stripes
Water ripples are only applicable under specific design requirements.
The wood grain direction is consistent. The vertical board has a "mountain" shape pattern that points upwards.
Board assembly process certification
No significant color difference, offset printing, or creasing.
No patching defects, seams are tight
The fingerhole-free phenomenon in the finger-joint process
II. Inspection Standards for Process and Structure
(1) Frame Structure Certification
Assembly Accuracy Inspection
The drawers and door panels are symmetrical, and the gaps are uniform and consistent.
90° opening test of the cabinet door: The cabinet does not tip over.
45° bevel joint without cracking or loosening
Safety performance inspection
All contact surfaces have been chamfered and rounded off.
No fragments, no burrs, no protruding nails
Aluminum frame doors, with smooth touch finish of aluminum edge sealing.
(2) Board Processing Certification
Edge Gluing Process Inspection
The edge sealing is smooth and flat, without any delamination or bulging.
No cracks or tears
Smooth edges without sharp corners
Quality inspection of processing
Cutting and drilling processes have no edge-bending phenomenon.
All the components can be fully assembled according to the instructions.
The special structure verification conforms to the design requirements.
III. Appearance Dimension Accuracy Certification
(1) Dimension Tolerance Control
Assembly Accuracy Inspection
Horizontal error: ±1.5mm
Diagonal error: ±3mm
Panel alignment flatness: ±0.4mm
Joint gap verification
The gap at the front joint is ≤ 0.4mm
The side joint gap is ≤ 0.8mm
Horizontal error of the layer board: ±1.0mm
(2) Function gap verification
Component inspection
Recessed drawer, door gap: 1.5 - 2.0mm
The gap of the cover-mounted door is ≤ 2mm, and the gap of the drawer surface is ≤ 1.5mm.
All the drawers are parallel to each other and there is no collision.
IV. Quality Inspection of Surface Treatment
(1) Paint Coating Certification
Appearance Effect Inspection
There is no significant color difference, and the color transition is smooth and gentle.
Texture, color tone, and transparency are all unified and harmonious.
There are no artificial touches. The wood grain is presented naturally.
Inspection of coating quality
The coating is fully saturated and there is no drying sensation.
Smooth on the surface without any particles or roughness
No oozing, whitening or fogging phenomena
(2) Detail Verification
Completeness Check
No omissions or inaccuracies
The bottom coating has completely dried and there is no re-attachment.
No scratches, dents, stains, or pinholes
V. Inspection Standards for Accessories and Stone Materials
(1) Certification of Hardware Accessories
Surface quality inspection
Smooth without scratches or marks
No burrs, poor electroplating
No sharp edges or corners, no rusting现象
Inspection of glass components
No scratches on the surface
No chipping or cracking at the edges.
(2) Stone countertop certification
Surface quality inspection
Smooth and flat, without any bumps or unevenness.
No scratches, cracks or hidden cracks
Uniform color with no impurities
Process quality inspection
The finish is excellent, with no signs of grinding marks.
The edges are free from chipping and the lines are smooth.
The seams are tight and the opening dimensions are accurate.
VI. Packaging and Document Inspection Requirements
(1) Packaging Protection Certification
Packaging Quality Inspection
The product does not move within the box.
The specifications of the carton meet the design requirements.
The appearance is clean and the shipping marks are accurate and clear.
Content verification
The specifications and quantities of components and hardware are accurate.
Hardware has spare parts available.
The hardware package and the instruction manual are clearly positioned.
(2) Document and Material Certification
Specification Inspection
The content is completely accurate.
Can correctly guide the customer to assemble
Completely matching the physical product
VII. Inspection and Certification Process
(1) Sampling Inspection Plan
Conduct sampling inspection in accordance with the AQL standard
Main defect AQL = 1.5, secondary defect AQL = 4.0
Comprehensive inspection of all special projects
(2) Inspection environmental requirements
Perform appearance inspection under standard lighting conditions
Measure the dimensions using precise measuring tools.
Carry out the inspection in accordance with the standard operation procedure.
(3) Quality Evaluation Criteria
Conformity Certification
All the projects meet the standard requirements.
The documents are complete and accurate.
The packaging is complete and meets the requirements.
Non-conformity handling
Items that fail the safety inspection shall be immediately rejected.
Exceeds the standard limit for appearance defects
The dimensional accuracy does not meet the design requirements.
By establishing a complete inspection and certification system for bathroom cabinets, and strictly implementing quality control throughout the entire process from raw materials to finished products, it is possible to effectively ensure that the product quality meets national standards and customer requirements, providing consumers with safe, beautiful and practical kitchen and bathroom furniture products.