This takes practice, and you have to be careful, as using a whetstone incorrectly could weaken or damage a blade's edge. It can be fixed, but still – practice and caution are key. Another thing to keep in mind about whetstones is grit, indicated by the numbers on the side of the stone.
Over-sharpening a knife can actually damage the edge and make it duller. It's important to sharpen a knife only when it needs it, and to sharpen it to the correct angle.
If the porous stones are not fully saturated, they will dry out during sharpening, causing the knife blade to catch, and giving your edge nicks and dings.
Whetstones will crack or break from too much weight being placed on them. If you store multiple on top of each other, the lower ones have a high chance of cracking.
Pull through sharpeners are absolutely horrible for high end cutlery. The tungsten carbide cutters will nick and chip harder steels.
Most pros would agree that pulling the blade edge across the whetstone produces the best results. Not only will it bring the knife to its sharpest but it's also a much more effective way to remove chips and imperfections from the blade.
You cannot harm an edge by honing it too much but if your angle is too great, you can roll the edge over, rendering the knife blunt. The MOST IMPORTANT thing is that you set your angle correctly at 15º for Japanese knives or 20º for Western knives.
Using the whetstone to attack is identical to performing a parry, but it can be used on nearly any enemy or boss, dealing 16 damage. In non-airplane levels, the player can only attack once before they have to land; all subsequent parries act as normal, non-damaging parries.
A whetstone can help you to keep the blade of a knife nice and sharp with just one or two strokes, which saves time in the kitchen.
Whetstones have an average lifespan of up to six years. If you use yours less often, you can expect to get more use out of it. Every time you sharpen a knife, it wears down the center of the stone. This wear and tear will eventually cause the stone to break apart.
While most cheap serrated knives can be sharpened and made to be as sharp as more expensive serrated knives, micro serrated knives cannot be sharpened. These are recognised by the sharp jagged cutting edge.
Push the point you want to sharpen with your fingers. While keeping the angle and pushing the point with your fingers, stroke the blade until it reaches the other edge of the whetstone, then pull the blade back until it reaches the edge of the whetstone. This back and forth is counted as one stroke.
Sharpening Angle Too High
In practice, an angle that is only slightly too steep will not dull the edge. Only very high angles will create edges that feel dull. Sharpening at a slightly higher angle will actually speed up sharpening, but at the expense of maximum sharpness.
Water and oil provide a lubricant on the surface to eliminate any extraneous friction, improve sharpening power, and prevent damage to the stone itself. Many chefs prefer a water stone to an oil stone – water is more convenient and facilitates a faster knife sharpening.
Pull-through sharpeners are the most popular way to sharpen knives, and with good reason: They are quicker than whetstones and more precise than sharpening steels. However, they shed the most amount of metal, which weakens the durability of knives.
The More Honing, the Better
Only a few swipes on the steel rod are needed to properly hone a knife, any more than that can wear out the knife's tines.
Many whetstones require to be soaked before you can sharpen with them and generally speaking, you'll need to do this for between 15 and 20 minutes. Some whetstones can be stored in water permanently which eliminates the need to soak them before each use.
This is why we do sharpening on both sides, even on single-edged knives. Doing light sharpening on the opposite side is the way to solve this burr issue and remove them. With carbon steel knives, this is quite easy to do, but stainless steel knives are much trickier due to being more difficult to sharpen in general.
As a general rule of thumb, you should sharpen your Japanese kitchen knives every 1-2 months, while you should hone every week to ensure a sharp edge. However, how often you sharpen your Japanese knives largely depends on your usage frequency.
The blade should move smoothly across the stone. Lift the knife, reset the heel at the top of the stone, and repeat. Count each pass made, so you're keeping each side of the knife even and not accidentally taking more material off one side than the other. Repeat as few as ten times and as many as 50.
ROUGH WHETSTONE
Among the three types of whetstone, this is the grainiest, ranging from #120 - #600. Use it when repairing a large edge that may include chips or cracks.
Common mistakes include twisting, pressing down or pausing the stroke of knives as you pull them through the sharpener slot. This can cause oversharpening (the loss of too much metal) or result in an uneven edge.
Unfortunately, they're also one of the most misunderstood. Contrary to popular belief, honing rods do not sharpen (even though they're often sold as “sharpening steels”). Instead, their primary purpose is maintenance.
Technically speaking, it's better to hone right before using a knife than after—the reason being that if a large amount of time has elapsed between honing and use, the knife can regress some and the edge bend back out a bit. But it's no biggie.