Custom Factory Black Bathroom Sink Cabinet
Custom Factory Black Bathroom Sink Cabinet
This cabinet is designed to house a bathroom sink in industrial or high‑traffic commercial settings where durability, chemical resistance, and a uniform black finish are required. It replaces standard vanity units with a purpose‑built enclosure that protects plumbing, provides storage, and maintains a clean appearance under frequent cleaning cycles.
Material & Construction
The primary structure uses 18 mm marine‑grade plywood cores bonded with a phenol‑formaldehyde resin, selected for its resistance to swelling in humid environments. All exposed edges are sealed with a 2 mm PVC edge band to prevent moisture ingress.
A 1.2 mm cold‑rolled steel frame is welded around the perimeter and treated with a zinc‑phosphate pretreatment before powder coating. The frame provides load‑bearing rigidity for the sink basin and any installed accessories.
The visible surfaces receive a two‑coat electrostatic powder coating in a matte black (RAL 9005) finish, cured at 180 °C to achieve a coating thickness of 80–100 µm, which meets ISO 12944‑5 C3 corrosion resistance for indoor industrial atmospheres.
Dimensions & Customization
Standard modules are available in widths of 600 mm, 800 mm, and 1000 mm, with a fixed height of 820 mm (including the countertop thickness) and a depth of 550 mm. These dimensions accommodate common wall‑hung or floor‑mounted sink bowls while leaving clearance for trap and supply lines.
Customization options include:
- Width adjustments in 50 mm increments from 500 mm to 1200 mm
- Height modifications for ADA compliance or ergonomic preferences
- Cut‑outs for faucet holes, soap dispensers, or electrical outlets
- Integrated shelving or drawer modules with 16 mm thick plywood boxes
- Alternative edge finishes such as stainless‑steel trim or ABS profiles
All custom dimensions are reviewed for structural integrity; any increase beyond 1000 mm width triggers the addition of a central vertical stiffener to maintain deflection limits under a 150 kg load.
Design Features
Integrated splash guard: a 15 mm high upturned front edge formed during the powder‑coating process directs water back into the sink basin, reducing wall staining.
Ventilation channels: 10 mm wide grooves routed into the rear panel allow air circulation behind the cabinet, mitigating condensation buildup on the interior surfaces.
Mounting system: pre‑drilled 8 mm clearance holes accept M8 anchor bolts for floor mounting or heavy‑duty brackets for wall mounting, with load distribution plates to prevent localized stress on the plywood.
Cable management: a 20 mm diameter PVC grommet positioned in the top panel enables routing of power cords for touchless faucets or LED lighting without compromising the coating integrity.
Typical Applications
Industrial facilities such as manufacturing plants, workshops, and laboratories require bathroom fixtures that withstand frequent wash‑downs, exposure to cleaning agents, and occasional impact. The black finish conceals water spots and chemical residues, maintaining a professional appearance.
Commercial kitchens and food‑processing areas benefit from the seamless, non‑porous surface that does not harbor bacteria and can be wiped down with alkaline detergents without coating degradation.
In public restrooms of transit stations or sports venues, the vandal‑resistant powder coat and reinforced frame provide a longer service life compared to standard laminate vanities, reducing lifecycle costs.
Quality Control & Testing
Each unit undergoes a 24‑hour humidity soak at 90 % RH and 30 °C to verify that the plywood core does not exceed 5 % thickness swelling. Post‑soak inspection includes visual checking for delamination and adhesion testing of the powder coat using the cross‑hatch method (ASTM D3359) with a target rating of 4B or better.
Load testing applies a 150 kg static load distributed across the sink mounting area for 10 minutes; deflection is measured with a dial indicator and must remain under 0.8 mm to ensure long‑term stability.
Final visual inspection checks for uniform coating thickness, color consistency (ΔE < 2 against RAL 9005 reference), and absence of surface defects such as orange peel or pinholes.
Specification Table
| Parameter | Typical Value / Range |
|---|---|
| Overall Height (incl. countertop) | 820 mm (±5 mm) |
| Width Options | 600 mm, 800 mm, 1000 mm (custom 500‑1200 mm) |
| Depth | 550 mm (±5 mm) |
| Core Material | 18 mm marine‑grade plywood (PF resin) |
| Frame Material | 1.2 mm cold‑rolled steel, zinc‑phosphate pretreatment |
| Coating | Matte black powder coat, 80‑100 µm thickness (RAL 9005) |
| Load Capacity (static) | 150 kg (deflection < 0.8 mm) |
| Environmental Rating | Indoor, ISO 12944‑5 C3 |
Frequently Asked Questions
Can dimensions be customized to match existing plumbing rough‑ins?
Yes. Width, height, and depth can be adjusted in 50 mm (width) or 25 mm (height) increments. Provide the rough‑in measurements and we will verify structural feasibility before quoting.
What information is required for a quotation?
Required details include: desired overall dimensions, sink bowl cut‑out location and diameter, any accessory cut‑outs (faucet, soap dispenser, electrical), mounting preference (floor or wall), and quantity. A simple sketch or CAD file speeds up the review.
Which material options are available for the core?
Standard is marine‑grade plywood. Alternatives such as moisture‑resistant MDF, phenolic‑coated particleboard, or stainless‑steel panels are available upon request and may affect lead time and cost.
How is quality inspected before shipment?
Each unit passes humidity soak, adhesion, load deflection, and visual checks as outlined in the Quality Control section. Inspection records are retained and can be supplied with the shipment.
What packaging methods protect the finish during transit?
Cabinets are wrapped in polyethylene film, placed on corner protectors, and stacked on pallets with interstitial cardboard layers. The pallet is then stretch‑wrapped and strapped to prevent movement. Edge guards safeguard the powder‑coated surfaces.
Ready to Discuss Your Project?
Share your specifications, and our engineering team will review dimensional constraints, material suitability, and finish options to provide a detailed quotation and lead‑time estimate.
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