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| Services |
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1)Does your company send free samples?
We are afraid not. We couldn't send free samples. It’s our sample policy in company.
2)Where is your factory?
Our factory is located in Shenzhen, a city next to Hongkong, Guangdong province, Mainland China
3)Do you have a minimum order?
We have a 200~500pcs minimum wholesale order on items. We base our business on volume purchases in order to keep our prices low. We have a low minimum order is just for new clients who can place a small trial order to test our quality and services before placing a large order.
4)Do you offer customized making?
Yes, we can tailor-made your designs, add your logo on blade and package. You are welcome to send us the detailed request. In addition to our standard products, OEM/ODM orders and buyers specifications are warmly welcome.
5)Can you supply cheap quality products?
No, we insist our quality and service level at any moment. Never Change.
6)What about the price level?
We are sure that our prices are very competitive compared with those at the same quality level, since we are the dealing in ceramic knife many years, and we always adhere to our principle China top quality products to our customers with competitive prices, and establish business relationship with all our customers on mutual benefit , And through so many years of efforts, we have established our fame in many countries, especially in many Euro countries, American countries…..etc.
7)Why we find some prices are very high compared with some other supplier, and from the picture or its code number, all looks the same?
Since China is still a developing country, few products have paten right, therefore many small factories are making copy to those products which are selling very fast in the market, of course, they have less expensive in produce these products, and mostly they are using cheap material and less quality control, so, from the picture it is hard to distinguish the quality difference, but when you put the two ceramic knife together, and then use them. It is very easy for you to judge which one is your best choice.
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| · Shipping & Delivery |
1)What shipping methods do you use?
All shipments are F.O.B. from our company.
Generally, We ship goods by DHL, UPS or TNT, FedEx, air cargo or your appointed forwarder agent which to be affirmed as per customers options.
2)How much is shipping cost?
Shipping rates are determined on current rates of the shipping company.
3)What is time of delivery?
Normally we delivery within 4 weeks after confirmation of order, For small order, please do check with us if we have ready goods in warehouse, we can make immediately shipment.
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| · Payment & Custom |
1)What is payment terms do you accept?
We normally accept T/T in advance, Western Union, 40% payment in advance before producing, balance 60% before shipping.
T/T: Telegraphic Transfer
Bank Information(USD):
Account Name: JEM Industrial Co., Limited
Account Number: OSA11011851681701
Beneficiary's Bank Name: Shenzhen Development Bank Co., Ltd., H.O., Offshore Banking Centre
Bank Address: 11/F, NO.5047, Road Shennan Dong, Shenzhen P.R. China
Swift Code: SZDBCNBS
2)Do you accept Credit Card payment or payment by PayPal?
Sorry, we can’t accept Credit Cards and PayPal.
3)Can I pay part of the remit first, and then the rest after receiving the goods?
We are afraid not. On the one hand, divided payment will only increase unnecessary expend for you. On the other hand, we are a formal company with a good reputation. If you are not so confident in shopping from us, you are suggested to place a small order for the first time to assess out credit. If the order amount is more than US$20,000 we will accept 50% down payment as confirmation and TT balance before delivery. If 100% T/T in advance, the customer will have 2% discount.
You have to pay customs fees and VAT when you get goods in your country. We neither can influence nor predict anything about your country customs policies. Customs fee and VAT are to be paid by you. These Express couriers will help costumers finish custom procedures. Anyway, it will be much appreciated if you can provide the special requirement of your custom policy to avoid any clearance delay. And we would appreciate if you provide us your Tax Id before shipping.
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| · Returns/Refunds Guarantee |
1)What should I do if the goods arrive damaged?
If your order has been damaged when you receive it, try to take a photograph of the package and express your refusal to accept it. In this case, please contact us as promptly as possible. We will check and take on our reasonable responsibility.
2)What about quality assurance?
All JEM ceramic knives with two years warranty coverage by following Use & Care Instructions
Your satisfaction is our foremost goal. Please contact us by phone or email as soon as possible if you have any questions or concerns about your order. If you are unhappy with your purchase, we will correct the problem or refund the purchase price dependent upon the circumstances.
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| · Ceramic Knife Knowledge |
What's a Ceramic Knife
What’s a ceramic knife?
Material:
Ceramic knife is a knife made out of very hard ceramic, often zirconium oxide (ZrO2; also known as zirconia). These knives are usually produced by compacting Zirconia powder using high pressure presses which apply a pressure of around 300 tons to produce blade-shaped blanks. These blanks are very brittle and fragile and can be shattered by a slight blow; special binders are used to retain the shape of the blank until the firing process. Like most ceramics these are consolidated into a dense and strong ceramic by solid-state sintering for 5-12 hours in a high-temperature furnace: approximately 1400 degrees Celsius. The result is a very hard and blunt blade which is then sharpened by grinding the edges with a diamond-dust-coated grinding wheel.Several brands offer a black blade made by an extra firing or sintering via hot isostatic pressing (HIP). This process improves the toughness of the blade, the key limitation to using ceramics in knife blades.
Advantages:
Advanced ceramic is second only to diamond in hardness. Long-wearing and corrosion-free, ceramic parts are often used in bone replacement procedures.
In fact, ceramic components are used in satellites, racecar brake pads and other applications that require extreme wear-resistance. For those components that would virtually disintegrate if made from metal, ceramic is the material of choice.
Zirconia is very hard; it ranks 8.5 on the Mohs scale of mineral hardness, compared to 6 to 6.5 for hardened steel, and 10 for diamond, giving a very hard edge that rarely needs sharpening. Ceramic blades can only be re-sharpened with a material harder than themselves; industrial grade diamond sharpeners are usually used.
Pure zirconium oxide is little used in industry due to its polymorphism. When heated from room temperature it goes through three phases: monoclinic, tetragonal, and cubic. Cooling to the monoclinic phase causes a large volume change, which often causes breakage. To alleviate this effect additives are utilized to stabilize the high-temperature phases and eliminate this volume change. Magnesium, calcium and yttrium are often used to stabilize the zirconium oxide; yttrium provides the best mechanical properties, yielding a characteristic mother-of-pearl appearance. The highest strength, and more importantly toughest, Zirconia is produced with 3 mol% yttrium oxide yielding partially stabilized Zirconia. This material consists of a mixture of tetragonal and cubic phase with a bending strength of nearly 1200MPa.
Ceramic knives will not rust, leading to their use by scuba divers. They are also nonconductive and nonmagnetic, which can be useful for bomb disposal operations. Their chemical inertness to both acids and alkalis and their ability to retain a cutting edge far longer than forged metal knives makes them a very good culinary tool for slicing and cutting through boneless meat, vegetables and fruits. Since they are very brittle they cannot be used for chopping, cutting bones or frozen foods or for any application which tends to twist the blade such as prying, which may cause the cutting edge to chip or the blade to break free from the handle. The tips of these knives are resistant to rolling and pitting, but may break if dropped.
Ceramic knives present a conceptual problem to the security industry since ceramics are not picked up by metal detectors. To solve this problem, many manufacturers of non-military knives include a quantity of metal in each knife to ensure they are detectable with standard equipment. Ceramic knives can be detected by extremely high frequency scanners (e.g. millimeter wave scanners), although (as of 2006) these scanners are not yet in widespread use.
Please don't hesitate to inquire about our services. We will do our utmost to accommodate. Our email address is alex@jemceramics.com
JEM Industrial Co., Limited
A Professional Manufacturer and Exporter of Ceramic Knife
Mr Alex Chan
Tel:+ 86-755-29120924
Fax: +86-755-61675959
Email: alex@jemceramics.com
www.jemceramics.com
Ceramic Knife Benefits
What are the Benefits of Ceramic Knife?
A Ceramic Knife is a knife made out of very hard ceramic, often zirconium oxide (ZrO2; also known as zirconia). These knives are usually produced by compacting zirconia powder using high pressure presses which apply a pressure of around 300 tons to produce blade-shaped blanks
These ceramic knives have numerous advantages of other types of knives like stainless steel. This article will discuss the various advantages of ceramic knives.
Hardness
The appeal of ceramic is its hardness. Zirconia is very hard; it ranks 8.5 on the Mohs scale of mineral hardness, compared to 6 to 6.5 for hardened steel, and 10 for diamond, giving a very hard edge that rarely needs sharpening. The ceramic knife is one of the hardest knives you can buy. The only thing that is harder than the material used to make these knives is a diamond. Ceramic knives are much harder than steel. Therefore, they will be much sharper than steel knives will be.
Weight
Weight is another advantage of ceramic knives. They are very lightweight. The same size stainless blade weighs significantly more. This will reduce the amount of fatigue you feel when you use ceramic knives for cutting tasks that you have to perform repeatedly.
Durability
Ceramic knives are also very durable. They will stay sharper for longer periods of time than stainless steel knives. Ceramic knives can usually go years without needing to be sharpened. They will also last longer overall because they will never rust.
Stain
The ability to resist stains is another benefit of ceramic knives. Some foods will discolor steel knives because they contain acids. Ceramic knives are not susceptible to these food acids, so they will never become discolored. Many knives also come with a non-stick surface, so they can easily be cleaned. In addition to resisting stains, these knives won’t mess with the taste of your food.
Chemically Inert
Ceramic knives are also chemically inert. Their chemical inertness to both acids and alkalis and their ability to retain a cutting edge far longer than forged metal knives makes them a very good culinary tool for slicing and cutting through boneless meat, vegetables and fruits. The surface of ceramic knives will also resist germs, so they are great for people who suffer from certain allergies.
These are some of the advantages of ceramic knives. They are extremely harder than steel, so they will be much sharper. Ceramic knives are also lightweight, so you won’t experience fatigue if you have to use them for cutting tasks that you have to perform repeatedly. These knives will also stay sharper much longer than steel knives.
You can usually use them for years without needing to have them sharpened again. But ceramic knives must be washed and dried by hand for long life and optimum results.
Also, the fact that they are made of ceramic means that if dropped, they may become chipped or broken. Ceramic is much more brittle than steel. Though the type of ceramic used for knife making means that they are unlikely to shatter, the edge is still rather fragile. You must take special care of these knives, and that means no dropping them into a drawer or trying to cut through bone or frozen foods. If you're accustomed to using your knives as prying tools, even though you shouldn't, you run a very good chance of breaking your ceramic blade.
Perhaps worst of all, there is no way for you to sharpen a ceramic blade. Like all knives, the blade of a ceramic knife will eventually become dulled, despite the strength of the ceramic material. When this happens, you'll have to send your knives back to the manufacturer or simply replace them. Coupled with the high price of ceramic knives, this can get expensive quickly. One of the benefits of knives made of steel is that they are easily sharpened at home using a knife sharpening kit.
JEM Ceramic Knife
Features:
1, Special Materials:
Using high-tech Zirconia crafted, high-density, high hardness, never wear, hardness (HRA87) is next to diamond, 60 times abrasion performance of the metal knife.
2, Green:
Lead-free, non-toxic, acid resistance, alkali resistance, never rust, health environmental protection; keep food color, flavor, enjoy the flavor, do not have any reaction to food, real health products!
3, Excellent performance:
because of its extremely high density and bright the knife is not easy to breed bacteria, cutting fish, fruits, vegetables and other clear-cut, anti-bacterial anti-fouling, easy to clean.
4, Elegant Appearance:
Appearance as jade-like soft moist, fine texture, adding to the enjoyment of the noble.
Please don't hesitate to inquire about our services. We will do our utmost to accommodate. Our email address is alex@jemceramics.com
JEM Industrial Co., Limited
A Professional Manufacturer and Exporter of Ceramic Knife
Mr Alex Chan
Tel: +86-755-29120924
Fax: +86-755-61675959
Email: alex@jemceramics.com
www.jemceramics.com
Ceramic Knife VS Metal Knife
What’s the Difference between a Ceramic Knife and Metal Knife?
Facts
Ceramic knives are made of zirconia, the same material used for the jewelry stones of the same name. It is the second hardest material to diamond.
Metal knives are often one-piece to allow for better weight and strength of the blade.
Features
The zirconia used for ceramic knives allows the blade to keep a sharper edge longer.
Stainless steel is used for metal knives and gives them a glossy, attractive appearance.
Function
Because they are sharpened to be thin, ceramic knives are not meant to cut frozen foods, bones, or anything not easily sliced.
Metal knives can be an all-purpose knife, being used to cut large food items or frozen goods.
Identification
Because there are no metal materials used to make a ceramic knife, there is no possibility for rust.
The shiny, silver blade, make metal knives easily recognizable.
Considerations
Ceramic knives, on the whole, tend to be more expensive than their metal counterparts. The material used is not man-made so it has a higher cost of manufacturing. Metal knives are cheaper, have a greater variety of use and have a greater possibility of wearing out over time.
Please don't hesitate to inquire about our services. We will do our utmost to accommodate. Our email address is alex@jemceramics.com
JEM Industrial Co., Limited
A Professional Manufacturer and Exporter of Ceramic Knife
Mr Alex Chan
Tel: +86-755-29120924
Fax: +86-755-61675959
Email: alex@jemceramics.com
www.jemceramics.com
How to Make a Fine Ceramic Knife
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Water, raw powder and ceramic milling balls are fed into a mixer-like device called a mill. |
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To create particles of uniform size, with diameters of approximately one micrometer (1 µm or 0.001 mm), raw materials are first mixed into a slurry — a fluid of water and ceramic powder in which the particles are blended.
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A spray dryer dehydrates the raw materials in the slurry to make a granulated powder.
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The granulated powder is used to fill a knife-shaped mold. |
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The mold is placed under high pressure — 1 ton per cm2 (approx. 12,900 psi) — to solidify the powder into the desired shape. |
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The material is then fired and sintered in a kiln, like conventional ceramics, but under precisely controlled temperatures. |
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During the firing process, the ceramic blade shrinks to 75 percent of its original, unfired size, while the volume shrinks by nearly half. These shrinkage rates are carefully calculated during the design process, so the finished size matches the design specifications. |
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The blade is then ground with a diamond wheel to produce a razor-sharp edge. |
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A handle is then attached to complete the process. |
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Facts
Ceramic knives are made of zirconia, the same material used for the jewelry stones of the same name. It is the second hardest material to diamond.
Metal knives are often one-piece to allow for better weight and strength of the blade.
Features
The zirconia used for ceramic knives allows the blade to keep a sharper edge longer.
Stainless steel is used for metal knives and gives them a glossy, attractive appearance.
Function
Because they are sharpened to be thin, ceramic knives are not meant to cut frozen foods, bones, or anything not easily sliced.
Metal knives can be an all-purpose knife, being used to cut large food items or frozen goods.
Identification
Because there are no metal materials used to make a ceramic knife, there is no possibility for rust.
The shiny, silver blade, make metal knives easily recognizable.
Considerations
Ceramic knives, on the whole, tend to be more expensive than their metal counterparts. The material used is not man-made so it has a higher cost of manufacturing. Metal knives are cheaper, have a greater variety of use and have a greater possibility of wearing out over time.
Please don't hesitate to inquire about our services. We will do our utmost to accommodate. Our email address is alex@jemceramics.com
JEM Industrial Co., Limited
A Professional Manufacturer and Exporter of Ceramic Knife
Mr Alex Chan
Tel: +86-755-29120924
Fax: +86-755-61675959
Email: alex@jemceramics.com
www.jemceramics.com
Use Instructions
Use Instructions for JEM Ceramic Knife
Use & Care:
With proper care, JEM ceramic knives will held its sharpness for literally years without re-sharpening
* Rinse in warm water or gently hand wash using a mild detergent in warm water.
* Do not drop the knife as this can cause the blade to break.
* Do not use the knife for plaining or grating.
* Do not use the knife as a lever.
* Do not twist the knife during the cutting process.
* Do not use to cut frozen goods, bones or fish bones.
* Do not wash the knife in a dishwasher machine.
* Store the knife in a conventional knife block or other stable environment.
* Keep the knife away from children.
* Do not try to re-sharpen the knife by yourself.
* Avoid using abrasive pads or powders.
Clean & Storage:
Ceramic knives will not tarnish or absorb food odors. They are easy to care for by rinsing in warm water, and they do not need to be fully dried when stored. The translucent blades are made from ceramic zirconium manufactured by JEM, the leader in fine ceramic materials. The master knife maker carefully shapes and sharpens each blade by hand. The black poly easy-to-grip durable and comfortable handle is impervious to water and will last the life of the blade. Each knife comes razor sharp in an attractive gift box. Instructions for care are included.
Attention
1. Generally, it use with woody or plastic chopping block, but not stone chopping block.
2. Preferably using for vegetable, fruit, flesh, do not use to chop or pry. Do not drop or pry as this may cause the knife to chip or snap the edge.
3. It can be cleaned by water or detergent, do not put it in the dish washer. Please put it into protective box after cleaning.
4. Please keep it carefully since the blade is very sharp, prevent children to touch it.
5. Avoid sharp it by traditional sharpener
6. Please remember to apply for customs declaration while you are carrying diamond knife by air
Please don't hesitate to inquire about our services. We will do our utmost to accommodate. Our email address is alex@jemceramics.com
JEM Industrial Co., Limited
A Professional Manufacturer and Exporter of Ceramic Knife
Mr Alex Chan
Tel: +86-755-29120924
Fax: +86-755-61675959
Email: alex@jemceramics.com
www.jemceramics.com
Frequently Asked Questions
Frequently Asked Questions about Ceramic Products
Q: Why Ceramic instead of steel?
A. The blade is extremely hard – only diamonds are harder. Expect little or no wear and tear on the blade. It will cut and cut and cut again . . .like cutting butter. The blade does not rust, spot or – Heaven forbid – pit, because it isn't made of steel. Sensitive food items such as eggs or citrus fruit will not assume a strange metallic taste from the blade. It is light weight, thus well-balanced. It is also antimagnetic and well-suited for special usages.
Q. What are ceramic knives made of?
A. These knives are made of an advanced, high-tech ceramic called zirconium oxide (also called Zirconium). This material, which is second in hardness only to diamond, was originally developed for industrial applications where metal components failed. Zirconium oxide is extremely hard, wear resistant, and chemically inert. For the technically minded, zirconium oxide has a hardness of 8.2 months (vs. steel at 5-6 months and diamond at 10 months).
Q.What is the difference between a black blade and a white blade?
A black blade is made out of a black zirconium oxide and offers extra durability. This type of blade goes through an extra firing process called a "hot-isostatic press," creating a tighter weave between the ceramic molecules, thus creating a tougher blade. The white ceramic blade is also made out of zirconium oxide but does not go through this expensive sintering process.
Q. How do I sharpen ceramic knives?
A. You can re-sharpen your ceramic knife with a powered diamond sharpening wheel.
Q. Will a ceramic knife break or shatter if I drop it?
A. No (with the possible exception of the tip). Zirconium oxide is a very strong material. Like a forged steel knife, however, you can likely break the tip if the knife lands on the tip. Fortunately, we can repair most damaged tips.
Q. How can I damage a ceramic knife?
A. Two ways. First, you can chip the edge if you cut into bones or use on a surface such as marble. Second, you can break off the tip or snap off the handle if you use it to pry. Please handle the blade carefully! Only wooden surfaces or the new plastic cutting boards are recommended. Surfaces of marble, glass, china or steel will impair the sharpness of the blade. Don't drop the blades on hard surface floors or use them as can openers. That's not included in their job description.
Q. How can I wash my ceramic knife and tools?
A. Ceramic knives and tools are very easy to clean with a quick wipe since food does not stick to them. Please do not wash them in the dishwasher. We do not recommend wash them in dishwasher since the dishwasher may be too rough and cause breakage .Violent motion against other objects, especially hard plates, could chip the objects and/or the ceramic knives and tools.
Q. Why are the main advantages of the ceramic products?
A. The superior hardness, superior corrosion resistance, superior erosion resistance and the superior thermal resistance, as well as the unique electrical and mechanical properties of JEM ceramic products are the enabling factors in these key applications.
Q. Where should I store my JEM ceramic knife and other JEM ceramic products?
A. You can store your JEM ceramic knife in a conventional knife block, in an in-drawer tray, or in the package.
Q. Where are JEM ceramic products made?
A. JEM produces ceramic knives in Shenzhen, a city in south China.
Q. How are JEM knives made?
A. First, we mold ceramic powder into blade "blanks" using special high pressure (many tons!) presses. Special binders in the powder allow the blanks to retain their shape before sintering (or firing), which takes several days at extremely high temperatures (in excess of 1000¯ C). We then grind and polish the sintered blanks to form an edge and the final shape before attaching the handle.
Q. Which Ceramic knives are sharper than they look likes?
A. It is true that they are sharper than they look likes. Because they are made of high-tech ceramic material, which is second in hardness only to diamond, ceramic knives are harder and sharper than most metal knives. Be careful when using the ceramic knives.
Q. Do you make ceramic scissors as well?
A. We offer ceramic scissors which are excellent for a variety of consumer and industrial applications.
Q. Will ceramic scissors shatter or break if I drop them? How can I damage ceramic scissors?
A. Ceramic scissors will not shatter when dropped. Like forged steel scissors, however, you can break the tip if the scissors land on the tip (very uncommon). You can also damage ceramic scissors by trying to cut very thick material or by trying to bend the blades. Ceramic blades are very strong, but not flexible.
Q. What is your warranty coverage?
A. All JEM products we have two years warranty by following our Use instructions.
Please don't hesitate to inquire about our services. We will do our utmost to accommodate. Our email address is alex@jemceramics.com
JEM Industrial Co., Limited
A Professional Manufacturer and Exporter of Ceramic Knife
Mr Alex Chan
Tel: +86-755-29120924
Fax: +86-755-61675959
Email: alex@jemceramics.com
www.jemceramics.com
What are the Differences Between Ceramic Kitchen Knives?
What are the Differences Between Ceramic Kitchen Knives?
Fruit Knife (Paring Knife)
Utility Knife
Santoku Knife
Slicing Knife
Chef’s Knife
Fruit(paring) Knife
It’s any knife that is designed to be used off the board, in the air basically. Small knife, used for delicate cutting, peeling, destemming strawberries, and such.
Utility knife
Utterly useless knife in the kitchen. Too short and narrow to be anything like Chef's or Santoku in the kitchen and too long to be a good pairing knife. Proponents of it say, it's excellent to cut sandwiches in half. So, if you do that all day, may be you should consider it, otherwise skip it for sure, and save money too.
As for the utility knives, they're one of the most useless kitchen knives. Too short and no knuckle clearance, to be useful for veggie chopping like chef's knifes or vegetable cleavers or nakiris.
Too long to be as good as paring knives for peeling/paring.
Santoku Knife
The Santoku knife has been called an Asian chef's knife in deference to its general utility at a variety of cutting tasks. The Santoku has a straighter edge than a chef's knife, with a blunted sheepsfoot-tip blade and a thinner spine, particularly near the point. From 12 cm to 18 cm (5 to 7 inches) long, a true Japanese Santoku is well-balanced, normally flat-ground, and generally lighter and thinner than its Western counterparts, often using superior blade steels to provide a blade with exceptional hardness and an acute cutting angle. This construction allows the knife to more easily slice thin-boned and boneless meats, fish, and vegetables.
Many subsequent Western and Asian copies of the Japanese Santoku do not always incorporate these features, resulting in reduced cutting ability. Some Western Santoku-pattern knives are even fitted with kullens, scallops on the sides of the blade above the edge, in an attempt to reduce the sticking of foods and reduce cutting friction. A standard in Asian (especially Japanese) kitchens, the Santoku and its Western copies have become very popular in recent years with chefs in Europe and the United States.
You'll never see Santoku in a pro environment in Japan, but it's very popular in households. Beats Nakiri in versatility and shorter/cheaper to compared to gyuto (Japanese chef's knife).
Slicing Knife
It’s used to cleanly slice peaces of meat and other soft food, often large. Because of that 6in long slicer sounds more like a joke. The idea of the slicer knife is to cut the piece in one (or two at most) slicing motion in order to have a cleanly cut surface on the slice.
Slicers don't work well as serrated bread knives, but vice-versa works better.
Chef's knife
General cutting, anything from soft meat to veggies. Can double as a slicer too, if it is long enough.
Remark:
5 and 7 inch is the blade length obviously. And 5 is too short too. Although, that's very personal, you have to decide for yourself.
Minimal set for home cooking is 8-12" long chef's knife + 3-4" paring knife and 10"+ long bread serrated knife. That will cover 99% of home cooking cutting. You can add boning knife or a slicer depending on your needs.
Please don't hesitate to inquire about our services. We will do our utmost to accommodate. Our email address is alex@jemceramics.com
JEM Industrial Co., Limited
A Professional Manufacturer and Exporter of Ceramic Knife
Mr Alex Chan
Tel: +86-755-29120924
Fax: +86-755-61675959
Email: alex@jemceramics.com
www.jemceramics.com
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