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Diamond Polishing Paste

Reliable Polishing Solutions for Ferrous and Non-Ferrous Surfaces

Achieve Superior Finish Stability with Diamond Polishing Paste

Diamond polishing paste is formulated to deliver superior surface finishing, dimensional accuracy, and material removal control in precision polishing applications. Crownkyn’s diamond paste uses high-purity synthetic diamond particles with tightly controlled grit sizes, uniformly dispersed in a stable, oil- or water-soluble base for consistent performance across various materials.

With excellent dispersion, sharp cutting ability, and thermal stability, our polishing paste delivers consistent surface finish, reduced polishing time, and repeatable results on hard materials such as carbide, ceramics, hardened steels, and optical components.

Crownkyn also offers customised formulations to meet your specific application needs—whether for ultra-fine finishing, intermediate lapping, or aggressive pre-polishing. Choose Crownkyn’s diamond polishing paste to achieve reliable surface quality, high polishing efficiency, and stable process control in your manufacturing line.

Oil Souble Diamond Paste

Size Range

400#~80000#

Concentration Range
  • Light：10%-20%, Surface finishing (e.g., optical mirror surfaces);

  • Medium： 20% -50%, General precision Polising.

  • Heavy： 50%-90%, Suitable for material removal.
Key Features
  • Stable oil-based formulation for long-lasting lubrication
  • High cutting efficiency with minimal drying during extended polishing
  • Uniform diamond dispersion for consistent surface finish
  • Suitable for materials sensitive to moisture
    • Typical Application
  • Polishing of carbide, tool steel, and mould components
  • Used in dry or extended-time polishing conditions
  • Suitable for moisture-sensitive materials

    • Water Souble Diamond Paste

    Size Range

    400#~80000#

    Concentration Range
    • Light：10%-20%, Surface finishing (e.g., optical mirror surfaces);

    • Medium： 20% -50%, General precision Polising.

    • Heavy： 50%-90%, Suitable for material removal.
    Key Features
  • Easy water cleanup with no oily residue
  • Eco-friendly and operator-safe formulation
  • Fast cooling and low risk of thermal damage
  • Excellent wettability and even spreading on hard surfaces
    • Typical Application
  • Polishing of optics, ceramics, and glass
  • Ideal for clean environments and easy cleanup
  • Effective for heat-sensitive materials
    • We offer polycrystalline diamond powder , Semi-Polycrystalline Diamond Powder and Agglomerated Diamond Powder in the form of polishing pastes and slurries, tailored to your specific requirements. Various concentrations and particle sizes are available to suit different precision grinding and polishing applications.

    High-Performance Diamond Paste and Slurry for Accurate Surface Preparation

    At Crownkyn, we offer high performance diamond paste engineered for accurate surface preparation across a wide range of hard materials. Formulated with precisely graded synthetic diamond particles, our paste delivers superior cutting efficiency, uniform finish and consistent performance. Ideal for polishing ceramics, hard metals and optical components, it ensures tight dimensional control, high surface clarity and extended tool usability, especially in precision finishing applications.

    Custom Diamond Paste for Accurate Polishing

    Consistent Particle Size Control: Available in a full range of micron sizes, from sub-micron to 40 μm, delivering accurate and repeatable polishing performance on hard materials.
    High Purity and Suspension Stability: Formulated with high-quality synthetic diamond and stable carrier mediums to prevent agglomeration and ensure even distribution.
    Efficient Surface Preparation: Excellent cutting ability enables fast material removal while achieving superior surface smoothness and clarity.
    Suitable for Various Applications: Ideal for polishing ceramics, metals, semiconductors and optical components in both manual and automated processing environments.
    Strict Quality Management: Controlled diamond concentration, shape and grading ensure batch-to-batch consistency and reliable results in critical finishing operations.

    Discover Crownkyn’s precision diamond paste solutions for critical surface preparation. Work closely with our technical team to select the ideal grit size, concentration and formulation to match your application needs—ensuring consistent polishing results, fine surface finishes and enhanced process efficiency across hard-to-polish materials.
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    Why Choose Diamond Compound Paste from Crownkyn

    At Crownkyn, we understand that precise surface finishing demands a dependable diamond paste solution. Our diamond compound paste is formulated with carefully graded synthetic diamond particles and stable carriers to ensure uniform polishing results. Rely on us for consistent quality, technical expertise and proven performance across a wide range of hard materials and critical finishing applications.

    Direct-from-Factory Efficiency

    With in-house production, we supply diamond compound paste with fast turnaround and full technical support, responding to your polishing requirements within 24 hours.

    Transparent & Competitive Quality Control

    From synthetic diamond selection to final formulation, we maintain strict control over particle grading and carrier stability—ensuring reliable paste performance for precision surface finishing.

    Consistent Results and Dependable Supply

    Every batch undergoes rigorous quality checks for particle size, shape and concentration, giving you the consistency and reliability needed for high-end polishing processes across various materials.

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    Frequently Asked Question

    Free samples of synthetic diamond powder or CBN powder about 50cts can be provided for quality test. Sample preparation typically takes 3–5 working days, and international delivery is about 7 days by air.
    we can provide analysis reports upon request. These may include particle size distribution（PSD）, crystal morphology, purity, magnetic content, and thermal stability, especially important for high-performance products.
    Pricing depends on product type (diamond or CBN), grit size, and application. MOQ usually starts from 1kg (5000ct). Volume discounts are available for bulk orders or long-term partnerships.
    Standard delivery time is 7–15 working days after confirming the order. We maintain stock for regular grades and can prioritize production to support urgent requirements when needed.
    All products are packed in sealed, anti-static, moisture-proof PE bags, or PE bottles and sealed in shock-proof cartons. And all packaging complies with international transport regulations.
    Absolutely. We support customized coatings (e.g., Ti, Ni, Cu) and tailor-made diamond powder and CBN powder to match different bonding systems and tool applications.
    We provide a full set of export documents including Certificate of Origin, MSDS, Packing List, and Commercial Invoice. Specific documents can be arranged based on your destination country’s requirements.
    We commonly offer air freight. Logistics can be handled by our team or your nominated forwarder, depending on your preference.
    Yes. Our production facilities ensure stable monthly output, supported by ISO-standardized quality control. We are able to meet ongoing demands and scale production for long-term cooperation.
    In case of verified quality issues, we offer free replacement or return. All related costs including shipping are covered by us. We prioritize long-term trust and transparency with our clients.
    SUbmit your questions

    Manufacturing Workshop

    Diamond Polishing Paste
    The Comprehensive Guide (2024)

    This guide explores the versatility of Crownkyn’s diamond polishing paste for high-precision surface preparation across hard materials. Whether you require oil-based or water-based formulations for manual or automated polishing, we help you choose the right grit size, concentration and carrier to match your process. Crownkyn delivers consistent quality and dependable performance to support both your finishing operations and distribution requirements.

    Table of Contens

    Purchasing Micron Diamond Paste for Your Tools from China?

    Read Seven Key Tips for Purchasing Diamond Slurry and Paste from China!

    What is Diamond Polishing Paste?

    Diamond polishing paste is a high-precision polishing compound formulated by blending micron-graded synthetic diamond particles with a stable carrier medium, typically oil-based or water-based. Engineered for superior surface finishing, it provides strong cutting action, excellent dispersion, and uniform polishing performance across hard materials. The diamond particles, ranging from sub-micron to around 40 μm, offer high hardness, thermal stability, and controlled particle distribution, ensuring consistent results in fine finishing applications.
    At Crownkyn Diamond, our diamond paste is manufactured under strict quality control to ensure uniform particle size, clean surface chemistry, and optimal concentration. It is widely used in polishing metals, ceramics, carbides, semiconductors and optical components, supporting industries such as tool manufacturing, precision engineering and electronics where high surface integrity is essential.

    Key Properties and Advantages of Diamond Paste

    Diamond paste delivers high hardness, excellent cutting efficiency, and consistent surface finish. Uniform particle size ensures precise polishing with minimal scratching, while stable carriers support even application and extended usability. Ideal for fine finishing of hard materials.

    High Hardness and Polishing Efficiency

    Diamond paste contains micron-graded synthetic diamond with exceptional hardness, enabling fast material removal and fine surface finishes on hard materials.

    Consistent Surface Finish

    Uniform particle size and shape ensure even polishing with minimal scratches, delivering reliable results for high-precision components.

    Stable Carrier Formulation

    Oil-based and water-based carriers provide smooth application, stable suspension, and easy cleaning—suitable for both manual and automated processes.

    Controlled Particle Grading

    Tightly controlled size distribution ensures consistent performance and predictable polishing outcomes across batches.

    Versatile Application Range

    Ideal for grinding, honing, and polishing hardened steels, cast irons, and other ferrous alloys in a variety of high-precision applications.

    Available Grit Sizes and Polishing Degree

    Diamond paste is available in various grit sizes from 0.25 μm to 40 μm to meet different polishing needs. Fine grades deliver smooth finishes for final polishing, while coarser grades support efficient pre-polishing. Each size is precisely graded to ensure consistent performance.
    Diamond Polishing Paste Particle Size Chart

    Surface Finishing Applications Across Industries

    Diamond paste is used across a wide range of industries, each requiring specific grit sizes, formulations, and performance levels for precision surface finishing. Selecting the right grade ensures smooth finishes, tight tolerances, and consistent polishing results. Typical applications include polishing metal moulds, ceramic components, semiconductors, optical elements, and precision tools in industries such as electronics, automotive, aerospace, and precision engineering.
    • Precision Mould & Die：Polishing of steel and carbide moulds to achieve high surface clarity and tight dimensional control for injection moulding and stamping applications.


    • Optics & Electronics：Finishing of glass lenses, optical components, and semiconductor wafers where fine polishing and scratch-free surfaces are critical.


    • Tool Manufacturing：Final polishing of cutting tools, inserts, and blades to enhance edge sharpness and surface integrity, improving tool life and cutting accuracy.


    • Automotive & Aerospace：Surface finishing of engine parts, valves, nozzles, and turbine components requiring mirror-like finishes and close tolerances.


    • Ceramics & Hard Materials：Polishing of advanced ceramics, carbides, and composite materials used in high-performance, wear-resistant applications.
    With precisely graded diamond particles, stable suspension, and excellent compatibility with oil-based and water-based systems, Crownkyn’s diamond polishing paste enables manufacturers to achieve consistent, high-quality surface finishes on metals, ceramics, optics, and semiconductors. It is trusted across precision industries such as electronics, automotive, aerospace, tooling, and mould manufacturing for critical polishing and finishing processes.

    Selecting the Right Diamond Paste for Your Process

    STEP 1

    Choose the Appropriate Grit Size

    Finer grits (0.25–3 μm) are best for mirror finishing and tight tolerances. Medium grits (6–15 μm) suit general polishing, while coarser grades (20–40 μm) handle initial lapping or pre-polishing.
    STEP 2

    Select the Right Carrier Type

    Use oil-based paste for metal surfaces requiring slow evaporation and smooth spreading. Choose water-based formulations for easy cleaning or where oil contamination must be avoided.
    STEP 3

    Match Paste Concentration to Application

    High-concentration paste is ideal for rapid polishing or hard materials. Lower concentrations are suitable for fine finishing where surface clarity and low residue are priorities.
    STEP 4

    Consider Material Type and Process Conditions

    Evaluate the workpiece material—such as ceramics, carbide, optical glass, or hardened steel, along with temperature, pressure and polishing method to select the best paste type.
    STEP 5

    Work with Crownkyn Experts

    Consult Crownkyn’s technical team to test samples, fine-tune the formulation, and ensure optimal polishing performance, consistency and cost-efficiency for your production needs.

    Sample Testing and Surface Finish Evaluation

    At Crownkyn, we understand that the precision of your polishing processes relies on verifying the right diamond paste formulation before committing to full-scale production. To help you achieve optimal surface finishes and process stability, we recommend the following steps for sample testing and evaluation.
    Custom Sample Preparation
    We offer tailored diamond paste samples in various micron sizes and concentrations to suit your material type, polishing equipment, and target surface finish. Whether oil-based or water-based, we customise to your process needs.
    Application-Based Testing
    Evaluate our diamond paste directly in your polishing process under real working conditions. Assess parameters such as material removal rate, surface uniformity, and finish clarity to determine suitability before full-scale application.
    Technical Support Service
    Our technical team is available to assist with polishing setup, process optimisation, and troubleshooting. We help you interpret surface roughness data, adjust polishing pressure and time, and recommend the best paste grade for your finish goals.
    Performance Feedback Loop
    We value your evaluation results and process feedback. This allows us to continuously refine particle distribution, paste consistency, and carrier fluid stability — ensuring consistent performance, reliable supply, and repeatable results with every batch.

    Packaging, Handling and Storage Guidelines

    At Crownkyn, we understand that the stability and performance of diamond paste must be preserved from production to point-of-use. Proper packaging, handling, and storage are critical to maintaining its consistency, dispersion behaviour, and polishing effectiveness. Please follow the guidelines below to ensure reliable performance.

    Packaging

    • Airtight, chemical-resistant containers to ensure stability
    • Sealed syringes or jars for clean and easy dispensing
    • Outer cartons for protection during bulk transport
    • Custom packaging and labelling available on request

    Handling

    • Wear gloves to prevent skin contact during application
    • Use clean, dry tools to avoid contamination
    • Mix gently before use to ensure uniform particle distribution

    Storage

    • Keep sealed in original container to maintain consistency
    • Store in a cool, dry, well-ventilated area
    • Avoid moisture, direct sunlight, and temperature extremes
    The Author
    Ashley Wei

    Hey, I’m Ashley Wei, the sales engineer of crownkundiamond.com Family-run business.
    An expert of Synthetic Diamond Powder specialist.
    In the past 26 years, we’ve supported 120+ clients across 35 countries, including diamond tools manufacturers and synthetic diamond powder distributors to significantly enhance their product quality and efficiency.
    The purpose of article is to share insights on advanced abrasive solutions, helping you produce higher quality diamond tools with improved performance and durability.

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