Our committed on going research and development with over 30 years manufacturing experience to bring better and new stone polishing diamond tools to the industry, we simply have better technology than our competitors. Passion and hard work at our laboratory and testing room became everyday life of our engineers.
(BK Products Testing Rooms)
The industry's only computer controlled and fully automated production line guarantees absolute consistency on our products. Every one of BK pads is made with perfectly weighted and mixed raw materials and being sintered at exact temperature and pressure.
Our premium and special pads contain 3-8 time more diamonds than those cheap pads sold in the industry. Our technology and high quality resin allow our pads to have the highest diamond concentrations among its classes to provide high polishing speed, long life and superior finish.
There are many different types of phenol resin and a high quality polyimide type phenol resins which has higher heat and abrasion resisting property are used. What we do differently from other diamond polishing pads is that we use different types of resin for different diamond sizes to maximize workability of diamonds. The suitable types of resin for different grits sizes are selected based on years of manufacturing, developing and testing experiences. For example, 50G works to grind whereas 3000G works to polish. The resin which has better adhesive strength, shock resistance, wear resistance and heat resistance are suitable for 50G and 2 to 3 resins are mixed to be used in manufacturing of our 50G diamond polishing pads. On the other hands, the resin which has soft and self wearing property, heat resistance, durability is more suitable for 3000G, and 3-4 different resins as well as some polishing compound are mixed to be used in manufacturing our 3000G diamond polishing pads.

Our sintering procedure has more technical measures than our competitors. Even though most resin manufactures normally inform 115 C as recommended sintering temperature, we found it to be not appropriate in sintering of resin with several other added materials in, specially organic and inorganic substances. So our sintering procedure has accurately required higher temperature and pressure, longer sintering time and more gas releasing periods to obtain optimal diamond-resin bonding required in stone polishing. Over or under sintering will greatly affect pads qualities in many ways.
We used multi-crystallized diamonds. Diamond will break as needed and new sharp angles are being exposed as diamonds wear out. This will result:

   (1) High polishing speed throughout pads' life
   (2) Will help the next finer pos. pad to polish faster and easier (because newly exposed smaller angles, 100 grit pads can have
        300 grit finish)***
   (3) Less overly scratches which the next finer pos. pad will have difficult time to remove.

In metal bond for cutting (actually by grinding), strong octahedral blocky shape crystals as per the below photo are considered to be a good diamonds.
Whereas weak and irregular shape crystals with impurities as per the below photo are considered a poor quality diamond because they tend to break easily.
For metal bond, softer bond is used so new diamonds can be exposed faster during the cutting.

In resin bond for polishing (grind to scratch and actually by removing lager scratches with smaller scratches), the above metal bond diamonds do not work. The diamond with multi-edge polycrystalline grit with fine substructure as per the below photo are considered as a good diamonds. Self-sharpening due to micro-chipping of the grains continuously exposes new edges throughout its life to bring fine and uniform scratching. These diamond are manufactured by a different methods from the method used to manufacture the above metal diamonds.
(Enlarged Photo with Electron Microscope)
Since the bonding strength of resins is not as strong as metals, Ni coated diamonds as per the below photos are often used to extend the life and enhance the performances.
(Enlarged Photo with Electron Microscope)
(Resin Diamonds during Polishing by Electron Microscope)
(Resin Diamonds during Polishing by Electron Microscope)
The cheap polishing pads are made with the above poor quality diamonds because of its low cost. Not like the above polycrystalline resin diamonds, these cheap diamonds will break away without giving new edges and fall out resulting considerably slower and poor performances and shorter life.

Plus, those cheap pads are also made with low quality resin under poor manufacturing system. Besides, poor polishing results, slower speed and short life, there often are problems of resin color marks on stones and Velcro coming off etc.

Besides diamond qualities, our years of manufacturing and developing experiences also allow us to select more suitable diamond grit sizes than others. Grit nos. shown on pads often indicates rough grit sizes. We use the grits nos. which are the industrys standards or just sequences not to share the exact grits sizes we use to maximize the pads polishing ability.
Carefully selected high quality hook and loop produced in Korea and glue produced in Japan are used to provide durability throughout pads' life.