High Performance Mining Machine Hand Rock Drill YN27C Suitable for Different Rock Layers Product Specifications YN27C Hand-Held rock drills Most suitable for drilling downward and inclined blast-holes in medium nard and hard rock with a  hardness of f=8-18: An ideal tool for rock drilling operations in small open-pit quarries, mines, water conservancy projects and road building in hilly areas, etc., and for secondary blasting in large mines More products
Technical Specifications 1.Weight of the main machine: 27kg 2.Overall dimension: 746¡Á315¡Á 229mm 3.Type of engine:single cylinder,air cooled two strokes 4.Cylinder Diameter stroke of piston:5 8 ¡Á 70mm 5. Rotating speed of engine: ¡Ý2450r/min 6.Displacement of engine plston: 185cm3 7.Type of carburetor: hand needle valve,no floating type 8.Ignition system: Controllable silicon contactless system 9. Drilling speed:(mean value of five holes) ¡Ý 250mm /min 10. Max. drilling depth: ¡Ý 6m 11.Fuel consumption: 0.122 /m 12.Tank capacity:¡Ý 1.14L 13. Mixing ratio of gasoline and lubrication oil (in volumes):12:1 14. End of drill rod dimensions: hexagonal2 2 ¡Á 108mm 15. Rotating speed of drill rod:¡Ý200r/min 16. Clearance of Spark plug :0.5 -0.7mm.
Summary Advantages: Needless to replace the internals of the engine head, just handle the handle to operate it. Easy to operate. More time-saving and effortless. Drilling faster and more efficient. Have reached the tip-top level of the same field now, and allow to be replaced with the same kind of the domestic products. Applications: Available for drilling, splitting breaking, ramming, shoveling. And widely used in mining, road contruction, quarrying and national defense construction, etc. Wooden crate
1.Introduction of YN27C internal combustion rock drill The YN27C internal combustion rock drill has various functions such as mining, drilling, building construction, geological exploration, cement pavement, asphalt pavement and other functions such as splitting, crushing, compacting and shovel. It is widely used in mining, road construction, quarrying, construction, railway tamping, geological survey, national defense engineering, etc. 2.Features of YN27C internal combustion rock drill You only need to move the handle as required to complete the drilling or crushing operation. The machine is easy to operate, saves time and labor, and has the characteristics of fast cutting speed and high efficiency. The machine has reached the first-class level of similar products and can be completely interchanged with international similar products. The drilling can be vertically downwards, horizontally upwards less than 45°, and vertically drilled up to six meters. The weight of the main machine is only 27 kg. Only one person can operate it. It is easy to carry. It is suitable for areas with high mountains, no power supply, no wind pressure equipment and temporary projects with large mobility. This machine has wide adaptability in both high mountains and flat land, regardless of the extreme heat of 40° or the cold region of minus 40°. This machine adopts export packaging, and all the indicators meet the export standards. This product is exempt from inspection and does not require commodity inspection for export. Since only gasoline needs to be added to work, no other auxiliary equipment is needed. This machine is suitable for mining of various mines such as iron ore, copper mine, nickel mine, lead-zinc mine, gold mine, gemstone mine, granite, bluestone and jade. 3.Parameters of YN27C internal combustion rock drill Host weight: 27kg Engine type: single cylinder air-cooled two-stroke gasoline engine Carburetor type: no float Ignition method: thermistor contactless system Engine displacement: 185 cm³ Engine load speed (measured when chiseling five holes): â?¥2450r/min Drill rod idle speed: â?¥200r/min Shank size drill rod tail: hexagon 22*108mm Deepest hole drilling depth: â?¥6m Fuel tank volume: â?¥1.14L Punching speed: â?¥250mm/min Gasoline and lubricating oil mixing ratio (by volume): 12:1 Spark plug electrode gap: 0.5-0.7mm Fuel consumption rate (measured when chiseling five holes: â?¤0.12L/M Impact energy: â?¥25J Shandong Master Machinery Group specializes in supplying internal combustion rock drills. The main models are YN27A, YN27P and YN27C.
Guar Gum Types Food, Feed & Pharma Grades - Various particle sizes (very coarse to very fine). - • Various hydration rates (very slow to very fast). - • Various viscosities (1% solution in water = 50 cps to 7000 cps). - • Special deodourised grades. - • Special low microbiological count grades. Technical Grades Straight Guars: - Various particle sizes (very coarse to very fine). - Various hydration rates (very slow to very fast). - Various viscosities (1% solution in water = 50 cps to 8000 cps). - Special good Dry-Flow (Free-Flow) Guars. - Special Anti-Dusted Guars. Modified Guars and Guar Derivatives: - Fast hydrating / High Viscosity / Diesel Slurriable (particularly suitable for oil, gas and other deep well drilling and EOR operations like polymer flooding / fracturing), - Borated. - Reticulated. - Oxidised. - Depolymerised. - High water absorbance capacity. - Carboxymethyl (Anionic). - Hydroxypropyl (Nonionic). - Hydroxypropyltrimethyl chloride (Cationic). - Hydroxypropyltrimethyl chloride Hydroxypropyl (Cationic, double derivative). - Special good Dry-Flow (Free-Flow) Modified Guars / Guar Derivatives. - Special Anti-Dusted Modified Guars / Guar Derivatives. Guar gum is a fiber from the seed of the guar plant. Guar gum is used as a laxative. It is also used for treating diarrhea, irritable bowel syndrome (IBS), obesity, and diabetes; for reducing cholesterol; and for preventing “hardening of the arteries” (atherosclerosis). In foods and beverages, guar gum is used as a thickening, stabilizing, suspending, and binding agent. In manufacturing, guar gum is used as a binding agent in tablets, and as a thickening agent in lotions and creams. How does it work? Guar gum is a fiber that normalizes the moisture content of the stool, absorbing excess liquid in diarrhea, and softening the stool in constipation. It also might help decrease the amount of cholesterol and glucose that is absorbed in the stomach and intestines. There is some interest in using guar gum for weight loss because it expands in the intestine, causing a sense of fullness. This may decrease appetite. USES: Diarrhea. Adding guar gum to the tube feeding formula given to critical care patients may shorten episodes of diarrhea from about 30 days to about 8 days. High cholesterol. Taking guar gum seems to lower cholesterol levels in people with high cholesterol. Guar gum and pectin, taken with small amounts of insoluble fiber, also lower total and “bad” low-density lipoprotein (LDL) cholesterol, but don't affect “good” high-density lipoprotein (HDL) cholesterol or other blood fats called triglycerides. Diabetes. Taking guar gum with meals seems to lower blood sugar after meals in people with diabetes. By slowing stomach emptying, guar gum may also lessen after-meal drops in blood pressure that occur frequently in people with diabetes. Constipation. Irritable bowel syndrome (IBS).
Capsicum Oleoresin is prepared by extracting the crushed capsicum (Capsicum Annum Linn) with volatile solvents by percolation method. It contains the pungent principles, capsicin not less that 8 percent. It also contains the red colouring matter called Capsanthin. This product is a powerful irritant and a carminative, which is also used as a counter irritant in lumbago and neuralgia. It can also be used to treat stomach ache that involves poorly functioning stomach muscles and as an antibacterial agents. Extraction of oleoresin capsicum from peppers involves finely ground capsicum, from which capsaicin is extracted in an organic solvent such as ethanol. The solvent is then evaporated, and the remaining wax like resin is the oleoresin capsicum. An emulsifier such as propylene glycol is used to suspend the OC in water, and pressurized to make it aerosol in pepper spray. The high performance liquid chromatography (HPLC) method is used to measure the amount of capsaicin within pepper sprays. Scoville Heat Units (SHU) are used to measure the concentration or "heat" of pepper spray. A synthetic analogue of capsaicin, pelargonic acid vanillylamide (desmethyldihydrocapsaicin), is used in another version of pepper spray known as PAVA spray which is used in the United Kingdom. Another synthetic counterpart of pepper spray, pelargonic acid morpholide, was developed and is widely used in Russia. Its effectiveness compared to natural pepper spray is unclear. Pepper spray typically comes in canisters, which are often small enough to be carried or concealed in a pocket or purse. Pepper spray can also be bought concealed in items such as rings. There are also pepper spray projectiles available, which can be fired from a paintball gun. It has been used for years against demonstrators. Derived from chilli peppers, oleoresin capsicum is the active ingredient in pepper spray and in some topical pain relievers.
Neodymium magnets (also known as NdFeB, Neo or NIB magnets), are strong permanent magnets made from an alloy of neodymium, iron & boron. Part of the Rare-Earth magnet family, they have the highest magnetic properties of all permanent magnets. Due to their high magnetic strength and relatively low-cost, they are the preferred choice for many consumers, commercial, industrial and technical applications.NdFeB is divided into sintered NdFeB and bonded NdFeB. Bonded NdFeB is magnetic in all directions and corrosion resistance and is divided into Bonded Compression NdFeB Magnet and Bonded Injection NdFeB Magnet; while sintered NdFeB is easy to corrosion, the surface requires coating, generally divided into axial and radial magnetic charging. Advantages of Sintered NdFeB Magnet : 1. Very hard and brittle, high diamagnetic resistance, high cost / performance ratio, not suitable for high working temper ature; 2. Magnetic performance is higher than that of the rare earth cobalt permanent magnet, the residual magnetic induction strength, magnetic induction coercivity, the maximum magnetic energy product is very high, is the current magnetic performance of the best permanent magnet; 3. High cost performance.
AINiCo is composed primarily of Aluminum Nickel Cobalt and also Copper and Titanium. They are manufactured through either casting or sintering process. Cast AINiCo may be manufactured in complex shapes such as horseshoes not possible with other magnet materials. Sintered AINiCo offer slightly lower magnetic properties but better mechanical characteristics. it can be efficiently magnetized in any direction, and for anisotropic AINiComagnet, it generally has greater magnetic capacitive in a preferred orientation than isotropic types. AINiCo is hard and brittle, Machining or drilling cannot therefore be accomplished by ordinary methods. Holes are usually cored in at the foundry, and magnets are cast close to final size and then finish machined to closer tolerances. â?¢ Advantages of AlNiCo Magnet: 1.Customized designs are available. 2.Max working temperature can be as high as 550�°C. 3.Disadvantage: Br and BH(max)are not as high as rare earth magnet. 4.High energies and relatively low coercivity. 5.High magnetic flux density; low mold charge stable temperature properties; easy to shap.
Ferrite Magnet is manufactured from oxide material by powder metallurgical process. Its advantages include: low-cost excellent corrosion resistance, resistance to be demagnetized etc. The normal working temperature of Ferrite Magnet is between-40C and +250C.It can be magnetized before or after assembling. Generally, Ferrite Magnet can be machined to regular shapes like segments, blocks, rings and discs etc. The normal grades for sintered Ferrite Magnets are Y10,TY25, Y30, Y30BH, Y35, etc. Advantages of Ferrite Magnet: Ferrites have isotropic characteristics, weak magnetic performance, has the same magnetic performance in any direction, multipolar magnetic charge. The main raw material of ferrite is oxides, so it is not corroded by high temperature, high humidity or chemicals (except strong acid and base); with excellent diamagnetic impedance, no flux loss before and after assembly and magnetic charging; working temperature is-40C to + 250C, poor temperature coefficient; Br temperature coefficient is-0.2% /C, 0.2% under Br, etc. per 1 Cincrease; high hardness, wire cutting and grinding; ferrite is brittle and fragile during production and transportation. magnetic requirements and good for strict working environment requirement.
Fasteners are the general term of the class of mechanical parts used in fastening two or more parts (or components) into a whole. It is widely used in energy, electronics, electrical appliances, machinery, chemical, metallurgy, mold, hydraulic and other industries, at the same time, in various kinds of machinery, equipment, vehicles, ships, railway, bridge, construction, structure, tools, instruments, chemical, instruments and supplies, you can see all kinds of fasteners, is the most widely used mechanical foundation parts. It is characterized by a wide variety of variety specifications, different performance uses, and a very high degree of standardization, series, and generalization. Therefore, a class of fasteners that already have national standards is called standard fasteners, or simply standard ones.
Flexible magnets are low-cost extruded permanent magnets made by bonding a strontium magnetic powder ina flexible vinyl binder. Microcrystalline magnetic powder of flexible magnet leads to its high magneticperformance, and artificial rubber makes it very flexible. Its maximum magnetic energy product has reached 90KJ/ m3 (11.25MGOe), industrial mass production magnetic performance range of 16 to 68KJ/m3(2.0~8.5MGOe).Due to its excellent flexibility, it can assemble faster than molded magnets. Flexible magnetic sheets, magnetic strips and labeling magnets are easy to use and manipulate to your desired specifications. Advantages of Flexible Magnet: Flexible magnets are easy to use, easy to manipulate, low cost and extremely versatile. They can easily be cut, bent,twisted, slit, or coiled and adhere to multiple items and surfaces. In addition, flexible magnetic materials require no surface treatments so no special precautions need to be taken to protect the magnetic surface. Our simple sheet on Care Tips will ensure that the use of magnetic sheeting on vehicles will not mar paint finishes. Technical Data of Flexible Magnet: Shapes: Rolls or Sheeting & Strips Magnetization: Axially Magnetized Br: 1,600 Gauss BHmax:0.60 MGOe Hc: 1,370 Oersted's Max Operating Temperature:212F/100 Density(lb/in3): 0.133
Adopting unique production technology, Focus- 6300 buytl tapes are mainly made of butyl rubber supplemented by other auxiliaries and fillers, with the superior high polymer materials. With its strong adhesion property and air-tight property, our waterproof sealing butyl tapes are environmental and solvent-free. Main Specification (Customized demand sare acceptable.) 6mm*8m 8mm*6m 10mm*4.57m Main Color - black Technical Data Product Series FOCUS-6300 Series Application Automotive Industry Elongation 500% Heat Resistance 90, no flowing within 2h Low Temperature Flexibility 40, no crack on surface within 24h Peel Strength 23N/cm Tensile Strength 230KPa Anti UV non-hardening and no cracks within in 2000h Corrosivity Non-corrosive to galvanized sheet, aluminum sheet and coppersheet. Advantages Strong adhesion, high tensile strength, excellent elasticity and extensibility. It can fully accommodate to the surface that it attached to Excellent performance in non-corrosive, weather resistance and adaptation. Applications Provide waterproof protection to car doors waterproof membrane. Provide waterproof and sealing protection to the battery of new energy automobile. Other waterproof applications on cars and new energy cars
yn27c gasoline rock drill is a hand-operated rock drilling tool. It is available for drilling, splitting breaking, shoveling. It is widely used in mining, road construction, quarrying. Applicable Industries:Construction works , Energy & Mining Condition:New Type:Rotary Drilling Rig Power Type:Gasoline Voltage: Customized Dimension(L*W*H):668*248*202 mm Weight: 27 kg Warranty:1 Year Core Components: Motor, Engine Drilling Diameter:30-43 mm Drilling Depth: 6 m
Our Acid Battery Scrap on 99.99%. Monthly Supply Capacity: 500 - 1500 metric tons, Type: all kind of scrap batteries, Fe Content: HMS Fe Content (%): 100%) Drained Battery Scrap: Black Packaging Detail: Pallet with shrink wrapping Battery features: - Sealed and maintenance free operation battery - Non-Spillable construction design. - ABS Containers and Covers (UL94HB), UL94V-0 optional. - Safety valve installation for explosion proof. - High quality and high reliability. - Exceptional deep discharge recovery performance. - Low self discharge characteristic. - Flexibility design for multiple install positions. - No memory effec - CE certificate - Wide operating temperature range Battery Application: -Solar system - Alarm System - Cable Television - Communication Equipment - Control Equipment - Security System - Medical Equipment - UPS - Power Tools - Toys - Emergency Power System - LED Lig WE ARE TRADING MANUFACTURERS OF ALL TYPES OF used car scrap battery WORLDWIDE. Specifications we are offer 1.dry charged battery & MF battery 2.Meet all DIN & JIS standard 3.Powerful quick scrap used a car battery Specifications Specifications 1.dry charged battery & MF battery 2.Meet all DIN & JIS standard 3.Powerful quick start & long life 4.1-2 year used car scrap battery 2/Product Feature: (1)Maintenance-free operation.there is no need to check specific the gravity of the electrolyte or add water to a battery during float service life. (2)Low self-discharge rate, small internal resistance. (3)The unique construction and sealing techniques of the battery, add the ABS plastic crust that guarantees leakproof operation in and position with no adverse effect on capacity or service life. (4)With our high-quality lead-tin-calcium alloy grids, it has a long usage life and deep discharge recoverability. (5)No pollution and no harm. Drained Lead Car Battery Scraps (Rains) Drained Lead-Acid Battery Scrap (RAINS per ISRI
Specifications: Sheet Size:210mm x 297mm, International Size A4 Quality: Imported 100% Virgin Wood Pulp Whiteness = 102-104%, Natural White Capability: High Speed Copying100ppm, Laser Capable,Inkjet Capable, Fax Capable. Thickness: 103-110 um Surface roughness TS ml/min: 75-175 Surface roughness BS ml/min: 100-200 Bending stiffness MD: >110 Mn Bending stiffness CD: >50 Mn CIE whiteness: 148-152 Cobb Test: 27-33 g/m2 27-33 multi-function A4 copy paper Basic weight - 70gsm, 75gsm, 80gsm Size - A4, A3, 8.5*11",8.5*13",11*17" Moisture - 3.5%-4.5% capapacity - >94% Brightness - 101-104% Place of Origin - Thailand Key Performance - No jam in photocopy machine Leave no dust in the copy machine Nice appearance-white and clean Nice touch-smooth and bulky No see through-print both sides Been developed for Photocopy Machines,Laser Printers,Inkjet Printers,Fax Machines Packing - 500sheets/ream,5,8 or 10reams/carton PACKING DETAILS - 500 Sheets per Ream 5 Reams per Box 1560 Boxes per 20ft container( With Pallet) 1600 Boxes Per 20ft container( Without Pallet) 7800 Reams Total in one 20FCL( With Pallet) 8000 Reams Total in one 20FCL( Without Pallet)
High-Performance Goat Feed (G-230815) Moisture (% Maximum) : 12.0 Crude Protein % : 14.7 Crude Fat % : 8 Crude Fiber % : 20.2 Digestible Energy (Ruminant) kcal/kg : 3350 Metabolizable Energy kcal/kg : 2685 Crude Ash % : 6.7 GENERAL DETAILS Ingredients : Corn Gluten Meal, DDGS, Pluses, Essential Amino Acids, Vitamins, Minerals, Trace Minerals, Toxin Binders and Mold Inhibitor Ingredient Profile : 100% Vegetarian Moisture (% Maximum) : 12 Product Form : Coarse Mash Form / Pellet Form Product Branding : ANUPAM Net Weight : 39 Kgs When Packed Product Pricing : On Unit Basis (for each 39 Kgs Packing) Production Capacity per Day : 450 MT/Day Factory Visit : Not Permissible Fumigation : Aluminum Phosphide or Methyl Bromide (or any as per buyer specification) Clinical Test Methodology : As per IS:2052 Proximate Analysis on Dry Matter Basis BASIC INFORMATION FOR DOMESTIC BUYERS Outer Packing : Poly Propylene (Milky White) Price Offer : On Ex- Factory Basis Mode of Payment : 100% Advance Through Bank, Cash/ Cheque/ RTGS/NEFT For Inter State Transaction : VAT Number is Must Tax Applications : NIL Truck Loading : 17 MT: 440 Bags, 21 MT: 540 Bags, 25 MT: 645 Bags, 28 MT: 720 Bags Minimum Order Quantity : As per Buyer Requirement & Material Availability with us. Buyer Branding Offer : Yes, for Bulk Orders Only. Buyer has to arrange for Packing Material BASIC INFORMATION FOR OVERSEAS BUYERS Inner Packing : Low Density Polyethylene Bags of 75 Micron Outer Packing : Poly Propylene (Milky White) Price Offer : On CIF Destination Port Basis or Delivery basis to Nearest Transit Port Mode of Payment : 100% Wire Transfer Only, we dont accept L/c or SBLC of any nature. Terms of Trade : Mutually Agreeable Basis Cargo Stuffing in 20 FCL : 600 Bags of 39 Kgs Total Load Stuffing : 23.4 MT in 20 FCL Minimum Order Quantity : 600 Bags or One 20 FCL Buyer Branding Offer : Yes, when MOQ = 3000 Bags or Five 20 FCL Nearest Transit Ports : Kandla Port, Adani Port and Pipavav Port Buyer Specific Packing Offered : Yes, when MOQ = 3000 Bags or Five 20 FCL Our Standard Shipping Document Phytosanitary Certification Fumigation Certificate Food Hygiene Certificate from Veterinary Department India
Fly Ash: Fly Ash is by product generated during combustion of coal, and comprises the fine particles that rise with the flue gases. Ash which is collected from the bottom is termed bottom ash. Fly ash is collected by electrostatic precipitators or other particle filtration equipment before the flue gases reach the chimneys of coal-fired power plants and together with bottom ash removed from the bottom of the furnace is in this case jointly known as coal ash. Depending upon the type of coal being used, the specification of Fly Ash varies considerably, but Fly Ash contains substantial amounts of silicon dioxide and calcium oxide (CaO), both being endemic ingredients in many coal-bearing rock strata. We are a reputed Fly Ash Exporter based in India and are supplying Fly Ash different cement, ready mix concrete, steel, refractories and construction industries. The Major Utilization Areas Of Fly Ash : - Manufacture of Portland Pozzolanic Cement & Performance improver in Ordinary Portland cement (OPC). - Part replacement of OPC in cement concrete. - High volume Fly Ash concrete. - Roller Compacted Concrete used for dam & pavement construction. - Manufacture of ash bricks and other building products. - Construction of road embankments, structural fills, low lying area development. - As a soil amender in agriculture and wasteland development. Types of Fly Ash: - According to the type of coal used fly is classified into two types. Anthracite and bituminous coal produces Fly Ash classified as class F. Class C Fly Ash is produced by burning lignite or sub-bituminous coal. Class C Fly Ash has self-cementing properties. - Class F and Class C Fly Ash are products of the combustion of coal in large power plants. Fly Ash is collected in electrostatic precipitators or baghouses, and then transferred to large silos for shipment. When needed, Fly Ash is classified by precise particle size requirements, thus assuring a uniform, quality product. - Class F Fly Ash is available in the largest quantities. Class F is generally low in lime, usually under 15 percent, and contains a greater combination of silica, alumina and iron (greater than 70 percent) than Class C Fly Ash. - Class C Fly Ash normally comes from coals which may produce an ash with higher lime content generally more than 15 percent often as high as 30 percent. Elevated CaO may give Class C unique self-hardening characteristics. Minimum Order Quantity : 1 container
Micro Silica Sand: Micro silica also known as fume, is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production and consists of spherical particles with an average particle diameter of 150 mm. The main field of application is as pozzolanic for high performance concrete because of its extreme fineness and high silica. Applications : Silica is added to Portland cement concrete to improve its properties, in particular its compressive strength, bond strength, and abrasion resistance. These improvements stem from both the mechanical improvements resulting from addition of a very fine powder to the cement paste mix as well as from the pozzolanic reactions between the silica fume and free calcium hydroxide in the paste. Advantages : Addition of silica also reduces the permeability of concrete to chloride ions, which protects the reinforcing steel of concrete from corrosion, especially in chloride-rich environments such as coastal regions and those of humid continental roadways and runways (because of the use of deicing salts) and saltwater bridges.
Kaolin: Kaolin uses are multiple and diverse. Kaolin are used as functional filler, extender, ceramic raw material and pigment because of its whiteness and fine particle size. Kaolin also hold importance as raw material in refractory applications, concrete, rubber and fiber glass manufacturing. We, as a Kaolin Exporter welcome any size of international orders from Middle East and other countries. Applications: Paper: Kaolin used as a coating pigment and as a filler to replace fiber. It possesses desirable optical properties. Concrete: Kaolin helps to improve strength and durability of concrete. When added to concrete mix, reacts with free lime released during cement hydration to produce additional cementitious material, resulting in an improved high performance concrete. Plastics : Kaolin is widely used as filler in the plastics industry because of its inert chemical nature and its unique size, shape and structure. Agriculture : It is used as a carrier and diluent in fertilizers, pesticides and related products. It is suitable as carrier because it aides the retention of the formulations on the plant. Rubber : It is commonly used as functional filler in rubber applications. While Kaolin improves overall performance for Rubber in general, different types of white pigment play specific roles in rubber application. Paint : Kaolin used as an extender in paints. It reduces the amount of expensive pigment such as Titanium Dioxide. It assists with desirable rheological properties that help maintain proper dispersion and provide bulk to the product. Ceramic : Kaolin improves whiteness and brightness of ceramic body. Good plasticity, good shrinkage, low water absorption and casting rate are also very important properties of kaolin.