[Boards: 3 / a / aco / adv / an / asp / b / biz / c / cgl / ck / cm / co / d / diy / e / fa / fit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mu / n / news / o / out / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / t / tg / toy / trash / trv / tv / u / v / vg / vip /vp / vr / w / wg / wsg / wsr / x / y ] [Search | Home]
4Archive logo
Why do razor blades dull and need to be replaced...
If images are not shown try to refresh the page. If you like this website, please disable any AdBlock software!

You are currently reading a thread in /sci/ - Science & Math

Thread replies: 33
Thread images: 4
File: razor.jpg (49 KB, 600x399) Image search: [iqdb] [SauceNao] [Google]
razor.jpg
49 KB, 600x399
Why do razor blades dull and need to be replaced when they're much harder than the hair that they cut?
>>
>>7805192
Short answer that's only slightly correct, but correct enough for you:
lateral forces.
>>
Why is it called a hamburger when theres no ham in it
>>
>>7805192
same reason you can bend a clothes hanger by pressing it against a pillow.

The blade doesn't wear away, the edge just gets deformed and stops being as sharp.
>>
>>7805192
doesn't it just get oxydized fast?
>>
How much wood would a woodchuck chuck if a woodchuck could chuck wood?
>>
File: KkXoq[1].jpg (275 KB, 2400x1200) Image search: [iqdb] [SauceNao] [Google]
KkXoq[1].jpg
275 KB, 2400x1200
Razor blades aren't hard. They're pretty soft. That is, they'll bend before they shatter. A thin piece of metal can only cut through so many chunks of keratin before its edge is rounded out, potholed, uneven, and oxidized to the point of being useless.
>>
>>7805203
There is a town in Germany called Hamburg.
>>
>>7805355
It also got deepfried in a bombing run during WW2, which is why the traditional hamburger is served well done.
>>
>>7805192
Yeah, so any blade ever in the world is actually a jagged awful mess at the microscopic level. When the edge gets dull, it's really just being bent or deformed away from it's cutting angle.

Remember when that weird guy in Inglorious Basterds was running his knife on his belt before he killed all the Nazis in the basement?

He was just straightening the deformities on the edge of the blade. Most of knife sharpening with an already sharp blade is just pushing the microsopic bent shit straight along the cutting angle.
>>
>>7806367
You can do the same thing with razor blades to make them last a lot longer. I run the razor opposite of razing direction against my arm once or twice before shaving. A disposable razor can last you months.
>>
>>7806777
Don't you cut yourself doing that?
>>
>>7806790
Not him, but no.You are simply stropping the blade back into realignment. I use the leg of my jeans usually.
>>
>>7805192
jews and planned obsolescence
>>
>>7805192
How do people cut and shape diamonds?
>>
>>7806802
With diamonds
>>
>>7806802
Since diamond is the hardest metal they actually can't be cut, they're just polished a lot until they look real shiny, that's why diamonds are so expensive, they're actually really common (the earth's core is 67.489% diamond) but it's rare to find ones pretty enough to put on a ring.
>>
>>7806802
Pressurized water.
>>
File: well met sci.png (181 KB, 800x677) Image search: [iqdb] [SauceNao] [Google]
well met sci.png
181 KB, 800x677
It was nice meeting you /sci/. Stay sharp.
>>
>>7806810
no, they're so expensive because de Beers controls all of them.

good goy, believing what they tell you.
>>
>>7806802
why don't people make razors out of diamonds if diamonds are the hardest metals
>>
>>7806864
It would probably just peel your skin off, you don't make something out of a metal as hard as diamonds without consequences.
>>
A macroscopic object composed of a single material isn't truly a whole object - there are cracks throughout it, and there may even be more than one giant crack that divides the object into two or more objects on a microscopic scale.

A diamond, for example, stays together because where the cracks meet, they fit together perfectly. On very small scales, simply the force of atoms grabbing each other and holding on is enough to keep the diamond together.

However, the fact that the diamond isn't a single objects, but two objects that can grind together by being pushed and pulled apart, means that the perfect fit soon becomes a crappy fit and the gap between the two objects is filled with tiny shards that move about and wreak the borders between the two objects further.

Metals are defined by the fact that the atoms, due to lacking free electrons in their outer shells, don't form molecules (Also called compounds.) Instead, they bind with one another via electromagnetic attraction - there is no whole object to break.

You may have noted before in your life that if you smash a metal object hard enough, it often doesn't shatter, but instead deforms. This is caused by a trait called ductility, and metals have a lot of it while often still requiring lots of energy to deform because of the strength of the EM attraction.

Razor blades dull because they're made from cut steel, rather than being melted and cooled in a mold. The cut edges are flaky, and they smooth out as steel is wont to do. Higher quality steel will hold an edge better - I've had an electric razor for over ten years.
>>
>>7806802
They're hard but very fragile.
>>
>>7805216
Is it weird I have zero issues pronouncing this fast? Non native English speaker even.

I'm not sure it's even meant as one of those sentences you would have difficulties with every second word.
>>
>>7806931
>Metals don't form molecules (Also called compounds.)
Kek no.
>>
>>7807691
Not really, it's not a real 'tongue twister' because it has a sing-song quality to it that makes it easy to recite. So it's just a fun thing to say when you're 4 years old.

Try saying 'She sells seashells by the seashore' and 'How can a clam cram in a clean cream can? 10 times as fast as you can.

Those are awful because they have no rhythm.
>>
>>7805192
planned obsolence, you cuck.
>>
>>7805216

If a woodchuck could then a wood chuck would, then he probably should chuck a good cord of wood.

Hood
Good
>>
try to shave with a pebble from the beach
its harder than your hair
>>
>>7806356
jesus
>>
>>7806802
"Due to extensive research done by the University of Pittsburgh, diamond has been confirmed as the hardest metal known to man. The research is as follows. Pocket-protected scientists built a wall of iron and crashed a diamond car into it at 400 miles per hour, and the car was unharmed. They then built a wall out of diamond and crashed a car made of iron moving at 400 miles an hour into the wall, and the wall came out fine. They then crashed a diamond car made of 400 miles per hour into a wall, and there were no survivors. They crashed 400 miles per hour into a diamond traveling at iron car. Western New York was powerless for hours. They rammed a wall of metal into a 400 mile per hour made of diamond, and the resulting explosion shifted the earth's orbit 400 million miles away from the sun, saving the earth from a meteor the size of a small Washington suburb that was hurtling towards mid-western Prussia at 400 billion miles per hour. They shot a diamond made of iron at a car moving at 400 walls per hour, and as a result caused two wayward airplanes to lose track of their bearings, and make a fatal crash with two buildings in downtown New York. They spun 400 miles at diamond into iron per wall. The results were inconclusive. Finally, they placed 400 diamonds per hour in front of a car made of wall traveling at miles per iron, and the result proved without a doubt that diamonds were the hardest metal of all time, if not just the hardest metal known to man."


looks we have a winner m8s.
>>
It oxidizes, then bends, leaving the blade potted and deformed.

Protip, run it with the grain along a pair of jeans before use to remove the oxidized layer. Then it will last longer.
Thread replies: 33
Thread images: 4
Thread DB ID: 461468



[Boards: 3 / a / aco / adv / an / asp / b / biz / c / cgl / ck / cm / co / d / diy / e / fa / fit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mu / n / news / o / out / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / t / tg / toy / trash / trv / tv / u / v / vg / vip /vp / vr / w / wg / wsg / wsr / x / y] [Search | Home]

[Boards: 3 / a / aco / adv / an / asp / b / biz / c / cgl / ck / cm / co / d / diy / e / fa / fit / g / gd / gif / h / hc / his / hm / hr / i / ic / int / jp / k / lgbt / lit / m / mlp / mu / n / news / o / out / p / po / pol / qa / qst / r / r9k / s / s4s / sci / soc / sp / t / tg / toy / trash / trv / tv / u / v / vg / vip /vp / vr / w / wg / wsg / wsr / x / y] [Search | Home]

All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.
This is a 4chan archive - all of the shown content originated from that site. This means that 4Archive shows their content, archived. If you need information for a Poster - contact them.
If a post contains personal/copyrighted/illegal content, then use the post's [Report] link! If a post is not removed within 24h contact me at [email protected] with the post's information.