The best starting board is the one your finishing line can turn into the approved part consistently.
A smooth-looking sheet is the beginning of that decision. The finished edge, groove, colour, gloss and fit matter to the furniture your customer receives. CUZI MDF manufactures and supplies MDF from our factory in Shuyang, China. We can help you compare the board and supplied condition around your component, then provide samples and a written quote for the work you need.
Compare Raw, Sanded and Paint Grade MDF by the supplied condition
These descriptions can overlap on a particular board. Our Raw MDF already has factory-sanded, unfinished faces. A Sanded MDF request places particular attention on the face preparation and inspection criteria. A Paint Grade MDF request connects the selected substrate and supplied condition with the component and coating trial.
| Description in your request | What it identifies | What to confirm for painting |
|---|---|---|
| Raw MDF | The selected unfinished MDF core and sheet or part format | Face condition, machining, edge preparation and complete coating trial |
| Sanded MDF | The core with an agreed sanding and face-condition scope | Sanding marks, cleanliness, visible faces and any extra preparation included |
| Paint Grade MDF | MDF selected and specified for the painted component | Board identity, core grade, face/edge/profile criteria and the approved finishing trial |
Compare the actual requirements and the work included. A change in the product description can add preparation or inspection scope; any specified difference in the MDF itself belongs in the written quotation. For our published 12–18 mm group, both Raw MDF and Paint Grade MDF use the 680–750 kg/m³ density band. The order records the selected nominal density and product grade.
A useful side-by-side trial keeps the component, machining and coating system the same while comparing the proposed substrates. Record the preparation needed and the completed result for each sample. This gives your team a reason to choose a board beyond its commercial name. See Raw MDF, Sanded MDF and Paint Grade MDF for the available supply descriptions.
Match the core and thickness to the part you will paint
Choose the substrate for the component's support, hardware, profile depth and environment. The finish then completes its appearance and protection. Our Raw and Paint Grade MDF input range is 2–35 mm, with the selected grade, thickness and supplied condition stated in the order.
| Painted part or design feature | Material and drawing information | Representative trial to make |
|---|---|---|
| Flat front or furniture panel | Thickness, support, visible faces and coating finish | Flat face, cut edge and completed colour/gloss |
| Routed cabinet door | Core thickness, groove depth, corner radii and hardware | Deepest profile, transitions, edge and hinge area |
| Painted moulding or shaped edge | Section, profile radii, fixing and visible surfaces | Machined profile after the full preparation and coating process |
| Large visible interior panel | Format, joints, support and handling arrangement | Representative visible area and finished joint or edge |
| Protected humid-interior component | Appropriate MR/HMR core, exposure, joints and covered surfaces | Complete protected part with the relevant performance information |
Standard Paint Grade MDF suits dry, protected interiors. For humid indoor uses, review Moisture Resistant MDF or High Moisture Resistant MDF together with the finish, edges and joints. Choose the core for the actual exposure; coating preparation and coverage remain part of the completed component.
Thickness also sets the room available for grooves, fixings and assembly. The representative diagram later in this guide uses nominal 18 mm MDF with a 4 mm deep groove, leaving 14 mm nominal core. Your component drawing sets its own remaining-section and hardware requirements. The board-size and thickness guide and MDF strength guide support that design discussion.
Agree what arrives at your workshop
State the delivery stage so purchasing, production and receiving share the same expectation. Paint Grade MDF describes the substrate and its agreed selection; priming and completed paint are separately described work.
You can request sanded uncoated sheets, cut or routed uncoated parts, a component with the specified sealer/primer, or a part with the agreed complete finish. Each request identifies the actual operations included, the covered surfaces and the sample or drawing used for checking it. Machining and any requested priming or finished coating are confirmed with the order scope and schedule.
For uncoated supply, record the face and edge condition your line needs before preparation. For a primed part, identify the primer products, covered areas, supplied sanding condition and the next coating step. For completed paint, add the colour, gloss, coating products, cure and handling condition, completed dimensions and packing requirements.
The published nominal input-board thickness tolerance is ±0.1 mm under the agreed measurement and acceptance method. Finished length, width, profile depth and completed coating build use their own drawing and order requirements. Keep those measurement bases separate in the specification. Our cut-to-size service, CNC MDF Processing and Routed MDF Cabinet Doors cover drawing-defined component supply.
Check the face, cut edge and groove on one sample
Use a representative machined sample to see how each area responds through the finishing sequence. The PA01 example below is the same trial geometry used on our Paint Grade MDF page: a nominal 300 × 200 × 18 mm piece with a 200 mm long, 10 mm wide and 4 mm deep round-ended groove. It keeps the flat face, cut edge and groove visible at three checkpoints.
The diagram is a sample plan. Its front layouts use the stated substrate geometry; section shapes, coating lines and colours are schematic. The 18 − 4 = 14 mm figure describes nominal MDF remaining below the groove. Actual surface observations, coating thickness and finished appearance are recorded from the physical trial.
| Area on the trial | Check before coating | Check after the specified finish and cure |
|---|---|---|
| A / broad face | Scratches, sanding trace, cleanliness and supplied face condition | Colour, gloss, texture and appearance under agreed lighting |
| B / cut edge | Straightness, fibre condition, tool marks and intended edge shape | Coverage, smoothness and the transition to the face |
| C / groove floor and walls | Dimensions, cutter marks, radii and access for preparation | Coverage, visible profile definition and any coating build in the detail |
| Reverse and hardware areas | Coverage schedule, holes, recesses and mating surfaces | Finished dimensions, hardware fit and agreed reverse appearance |
| Whole part and pack | Identification, drawing revision and handling surfaces | Cure condition, suitable separators, marks after packing and fit at assembly |
Inspect the raw part first, then retain that part identity through priming and topcoating. A mark visible before coating can be reviewed with machining or preparation; a change appearing later can be reviewed with the corresponding coating or handling stage. Photographs at the agreed checkpoints help your workshop compare the result and repeat the successful sequence.
For the actual order, include the smallest groove, deepest route, most visible edge and relevant hardware feature. A small coupon screens the finishing system; a full first component adds the production geometry and assembly checks. Our cabinet-door application guide helps organise the complete front and reverse requirements.
Choose primer, sanding and topcoat as one system
Discuss the proposed MDF and application method with your coating supplier. Use its current technical instructions to establish compatible preparation, sealer or primer, topcoat, application and cure. The useful choice reflects your equipment, production quantity, intended appearance and service demands.
The European Panel Federation's lacquer-finishing guidance treats surface preparation, edge preparation and coating compatibility as linked finishing decisions. Its edge-finishing guidance also describes sealing exposed fibre areas before finishing. Use those principles with the actual products and instructions for your line.
Record the abrasive sequence for the supplied face, cut edge and routed profile, together with the dust-removal method. Before the next coating, check the prepared surface against the selected system's instructions. Agree the application method and any mixing, thinning, working-time or film-build requirements that apply to the named products. Retain the application and cure conditions with the sample record.
Primer is a defined preparation and coating stage. Review the primed face, edge and groove for the supplied condition expected by the topcoat process. When intermediate sanding or denibbing is required, follow the selected product's cure, abrasive and preparation instructions, then recheck the profile and surface before topcoating. A consistent trial gives your line its repeatable process.
For water-borne or solvent-borne products, ask the coating supplier to confirm the complete system on the actual MDF, including the exposed edges and profiles. The MDF edge preparation guide covers the detailed edge sequence. This selection guide focuses on choosing and specifying the board and trial that enter that process.
Allow for coating build in the completed dimensions
Primer and topcoat contribute to the finished part dimensions. Identify which measurements describe the uncoated blank, the primed part or the fully cured component. Drawing datums, hardware clearances and neighbouring parts should use the agreed completed condition.
As an arithmetic example, assume a total dry coating build of 0.10 mm on each of two broad faces, equivalent to 100 μm per face. An 18.00 mm MDF substrate then gives a nominal completed thickness of 18.00 + 0.10 + 0.10 = 18.20 mm. Under the separate assumption that these two coating builds stay exactly 0.10 mm, a 17.90–18.10 mm input board would give 18.10–18.30 mm completed thickness. Actual coating variation and the order's measuring method establish the real finished range.
For a nominal rectangular 600 × 400 mm blank, the same assumed 0.10 mm dry build on both opposing edges of each dimension gives 600.20 × 400.20 mm. For a straight groove with two vertical walls 10.00 mm apart, that fixed assumed build on each wall gives 9.80 mm remaining width. These calculations illustrate dimensional planning; your coating supplier's instructions and the physical sample define the required film build and actual finished geometry.
Keep the reference groove and intended profile visible after the complete system. Check its floor, walls, round ends and transitions alongside the completed edge and front face. For a cabinet door, fit the selected hinges and hardware to the cured first part and compare it with the mating component. The CNC specification guide helps connect the front, section, holes and finishing allowances to the machining request.
Approve the finish with a short sample sequence
Move from a material coupon to a representative part, then to the first finished component. Each sample answers a different purchasing question. Keep the material, drawing and coating references with the actual findings so the next order can use the same starting point.
| Checkpoint | What the sample answers | Information to retain |
|---|---|---|
| Substrate coupon | Whether the supplied face suits the preparation and coating trial | Board identity, grade, thickness and supplied condition |
| Machined edge/profile sample | How cutting and routing affect the surfaces to be painted | Drawing, tooling/preparation scope and actual uncoated observations |
| Primed sample | Whether the specified system gives the intended next-stage condition | Product references, application, cure, sanding and actual observations |
| Completed first component | Whether appearance, profile and assembly fit meet the agreed reference | Colour/gloss, viewing conditions, completed dimensions and hardware findings |
| Packed component trial | Whether the cure and pack materials suit handling and delivery | Handling condition, separators, support and observations after unpacking |
Define the viewing conditions for appearance: lighting, angle, distance, colour reference and gloss or texture expectation. Identify highly visible faces and edges, concealed reverse areas and hardware interfaces on the drawing. Compare each area with the retained physical component and the agreed acceptance description.
Appearance approval and performance testing have separate records. If the customer specifies adhesion, liquid resistance, heat, abrasion or another finish property, record the required method, construction, result and relevant report. MDF emission or fire requirements also follow the identified product and applicable completed construction. The MDF sample approval guide covers the broader sample-to-production sequence.
Compare the work required and protect the result
Compare quotations at the same supply stage and on the same completed part. Include the selected board, cutting or routing, face and edge preparation, primer, topcoat, setup, handling, inspection and packing where they belong in the order. Your workshop's actual preparation time, material use and accepted output give the comparison meaning.
A board that needs less work in your trial may offer value even with a different purchase price. Record the operations and the accepted part count so the production decision reflects the result your customer receives. The Raw MDF vs Melamine MDF comparison demonstrates cost per accepted component, while the quotation comparison guide covers delivery and commercial scope.
Keep uncoated stock and parts flat, dry and clean. For primed or completed painted parts, use the coating system's confirmed cure and handling condition before stacking and packing. Agree clean compatible separators, supported packs and protection for faces, edges and profiles. A packing trial checks the actual contact materials and movement; retain those findings with the finish reference. Our MDF storage and conditioning guide supports the incoming-material and workshop planning.
Request the board and trial your finishing line needs
Start with the component, thickness, sizes, quantity and destination. Add the substrate grade and emission requirement, the supplied stage, front/reverse drawing, visible edges and profiles, and the intended coating system or finish reference. Tell us which work your factory handles and which operations you want included in our supply.
FOB China price: US$157–258/m³ for Paint Grade MDF. The written quotation identifies the actual board, quantity and pricing basis. Machining, extra preparation, priming, completed coating and packing are included or separately charged according to the agreed scope. Use our MDF ordering checklist to prepare a short specification.
Samples are free across our product range and generally available from stock. You pay the courier cost, which can be credited against the formal order amount. A prepared or coated sample receives confirmed geometry, supply stage and preparation timing for the request. We confirm availability, courier cost, dispatch and estimated transit time before sending. Request MDF samples for your coating trial.
We reply within 12 hours. Normal MOQ is 1 × 20'GP per individual specification, and normal production lead time is 3–10 days after specifications and commercial terms are confirmed; the quote schedules the actual machining and any agreed coating work. Formal quotations include specification, quantity, price/currency, packaging, FOB Qingdao or FOB Lianyungang, lead time, T/T or LC terms and validity. Third-party inspection is supported, and export ports are Lianyungang and Qingdao. Request a painted-component supply quotation or request documents for the proposed MDF and finish.
Questions buyers ask
Which MDF is best for painting?
Choose the substrate that meets your agreed face, edge and profile requirements through the complete coating trial. Raw, Sanded and Paint Grade descriptions can overlap; compare the actual board, preparation included and completed component result.
Is Paint Grade MDF automatically different from Raw MDF?
The quote identifies any difference in the substrate and work included. Our Raw MDF has sanded unfinished faces; a Paint Grade request adds the agreed painted-component selection and trial criteria. Both published 12–18 mm groups use 680–750 kg/m³.
Does Paint Grade MDF arrive primed?
State the supply stage in the order. Sanded uncoated MDF, machined uncoated parts, specified priming and completed paint are distinct supply scopes. We confirm the actual products, covered surfaces and preparation included in your quote.
Which primer and sanding grit should I use?
Use the coating supplier's current instructions for the selected MDF, products and equipment. Establish the face, edge and groove preparation and intermediate sanding on the representative sample, then retain that sequence for production.
Can I obtain a high-gloss finish on MDF?
A high-gloss request includes the required surface preparation, coating system, gloss reference and viewing conditions. Check a representative face, edge and profile after the full application and cure, with the coating supplier confirming the system for your line.
Should painted kitchen or bathroom parts use MR MDF?
Choose the core for the component's actual humidity and water exposure. For protected humid-interior parts, review an appropriate MR/HMR core with the finish, edges, joints and openings. Keep the completed construction and required performance information together.
Does nominal 18 mm MDF remain 18 mm after painting?
The completed measurement includes the actual dry coating on the covered surfaces. Record input-board thickness separately from the primed and finished dimensions, then check the completed component and its hardware fit against the drawing.
How do I keep painted parts consistent on repeat orders?
Retain the board identity, supplied condition, drawings, preparation and coating products, application/cure record, accepted physical part and packing reference. Record actual findings for the new batch and agree any changes before repeat production.
Can I request samples and machining directly from CUZI MDF?
Yes. Our factory supplies the MDF and agreed cut or routed components, with sample and any requested coating scope confirmed in the quote. Share the part and finish you want to evaluate; samples are free with buyer-paid courier cost creditable against the formal order.