According to our vision, a knife is totally accomplished and relevant only if it lasts in time.
To meet this requirement, our technical teams give priority to the following 4 bases:
Great technological advances have
made available stainless steels which are more and more efficient in terms of
cutting strength, corrosion resistance and flexibility.
A good cutlery steel generally
contains 85% iron, 13 to 15% chromium (anti-corrosion agent), about 0.4% carbon
(determining factor for the hardness o the blades).
Other components such as molybdenum,
vanadium and nickel, can be added in very small amounts to improve corrosion
resistance or the cutting edge lifetime.
Since the beginning of metalworking, knife blades have always been forged. Forging is the operation which consists in hot transforming a metal part called “crampon”, by successive crushing (in kinds of adapted moulds) into an elaborate part in which the final part will then be cut.
However, since the appearance of
rolling techniques (crushing the metal between two rolls very close to each
other), in the 1920’s, the manufacture of cut blades has developed. This modern
process provides blades of a great regularity and at lower cost, while
guaranteeing excellent mechanical and cutting qualities.
Many professional knives are still
produced with forged blades (Grand Chef), with a bolster located between the
blade and the handle which ensures the knife’s robustness and styling.
So, with or without bolster?According to our previous writings, it is therefore mainly a criterion of aesthetic appreciation that will be decisive.
The tang is the extension of the blade into the handle. A knife whose tang extends the whole length of the handle is a criterion of quality and robustness. However, the development of overmoulding techniques and the improvement of plastics also fully ensure robustness, with all kinds of tangs.
Quenching consists in heating steel to about 1040°, then cooling it rapidly, taking the blade's hardness to a higher level.
A second heating to about 200° (called "temper") followed by a slow cooling provides blades that:
To be able to cut well and for a long time, a cutlery steel must contain carbon. Despite all the precautions taken during the manufacture, it is impossible to guarantee a total corrosion resistance. In contact with a saline medium, with a wrong setting of the dishwasher, or in the presence of water with a low pH, lower than 7 (like some products: mustard, vinegar, cola…) or some liquids, small oxidation spots can appear on the blade.
We advise you not to leave your tools in contact with moisture and food. Dry them well after use. In case of small marks, you can rub the blade gently with a jex pad.
In the last few years, the manufacture of ceramic blades has made considerable progress.A ceramic knife does not cut any better than a good knife with a steel blade. However its texture being harder than steel, its lifespan will be longer.
Examples of blade profiles:
which will give the best cut from its first use, with a longevity often above the average of most major international brands.
For a controlled and efficient cutting duration.
Déglon is one of the few knife manufacturers in the world to be equipped with a standardized machine for controlling the cutting power. We use this approach to improve our performance.
After a standardized process (60 runs), the cutting test machine gives results on:
On this drawing, the green line represents Déglon’s 20cm forged GRAND CHEF knife.
The yellow line is a competitor’s knife.
Once the optimal cutting time has
been achieved, other qualitative criteria are targeted according to usage, both
for knifes and for our other culinary tools (spatulas, decozest, etc.) in
By defining and meeting these
criteria, we can offer a LIFETIME WARRANTY* on Déglon products, a warranty that
we have been assuming for almost 100 years.
* Against manufacturing defect and
under normal use
The main quality and selection criteria for handle definition are:
ADHERENCE TO ALL THESE CRITERIA ALLOWS US TO OFFER OUR CUSTOMERSA LIFETIME* GUARANTEE ON DÉGLON PRODUCTS.
* (Under normal product use).
Our knives, scissors, spatulas, and service, preparation, and decoration tools… have a lifetime warranty.
Some additional products have specific warranty periods: