Just randomly came across this video.
Would be awesome for someone to figure out how to make the blades last longer - or AT LEAST shave at their sharpest for fewer shaves.
When a razor/blade maker figures this out...
- Thread starter MrFritz
- Start date
Just randomly came across this video.
Would be awesome for someone to figure out how to make the blades last longer - or AT LEAST shave at their sharpest for fewer shaves.
Hi,
The Personna 74's were great. Tungsten alloy. Costly, though. Didn't sell well as a result. Even though the way they lasted made them a really good deal. I wish AccuTech would bring them back.
Stan
The Personna 74's were great. Tungsten alloy. Costly, though. Didn't sell well as a result. Even though the way they lasted made them a really good deal. I wish AccuTech would bring them back.
Stan
Depends on your blade… pre-1890 manufacture. Cost per shave and longevity is… hard to quantify, but they’ve got another couple hundred years of shaves left on ‘em. There are also some 1835-ish built blades owned by members here in use
Interesting video. I am very skeptical about the implication that most of this information was learned recently.
Possibly the part about cracks at grain interfaces and possibly the part about rolling the edge to make it stronger.
The general observations about wear being accelerated on rougher edges and the local exponential wear trends do not require an electron scanning microscope or anything sophisticated.
I have been able to make similar observations with under $500 of equipment in my free time over a period of under three months.
Any competent engineer at any manufacturer over the last 75 years would probably observe and understand these things as well, and I find it impossible to believe than many of them did not.
All you need is a force meter, a decent optical microscope, and some understanding of metals and such. My background in aerospace and science was sufficient, and I don't think I ever learned about sharpness in school or professionally. I don't want to sell myself short, but there had to be other smart competent people trying to understand this stuff before 1950.
Possibly the part about cracks at grain interfaces and possibly the part about rolling the edge to make it stronger.
The general observations about wear being accelerated on rougher edges and the local exponential wear trends do not require an electron scanning microscope or anything sophisticated.
I have been able to make similar observations with under $500 of equipment in my free time over a period of under three months.
Any competent engineer at any manufacturer over the last 75 years would probably observe and understand these things as well, and I find it impossible to believe than many of them did not.
All you need is a force meter, a decent optical microscope, and some understanding of metals and such. My background in aerospace and science was sufficient, and I don't think I ever learned about sharpness in school or professionally. I don't want to sell myself short, but there had to be other smart competent people trying to understand this stuff before 1950.
- Thread starter
- #6
I really think the goal is to sell more blades, so the sooner they wear out, the better for profit.
Yeah, make one that gives the correct number of perfect smooth and close comfortable shaves and then fails catastrophically like shattering glass.
I don't think it's really new information as much as it's a much better visualization of it, at a much earlier stage of the degradation process.
- Thread starter
- #9
Looks like someone posted the full MIT study last year.
I'm sure it says more than the YouTube video.
Thread 'MIT STUDY ON THE REASON WHY HAIR DAMAGES RAZORS' MIT STUDY ON THE REASON WHY HAIR DAMAGES RAZORS - https://www.badgerandblade.com/forum/threads/mit-study-on-the-reason-why-hair-damages-razors.639088/
I'm sure it says more than the YouTube video.
Thread 'MIT STUDY ON THE REASON WHY HAIR DAMAGES RAZORS' MIT STUDY ON THE REASON WHY HAIR DAMAGES RAZORS - https://www.badgerandblade.com/forum/threads/mit-study-on-the-reason-why-hair-damages-razors.639088/
They were great blades!
Hi,
Yep.Good Old Personna. They split more ways than a Uranium atom. Then, the parts bought and sold and the US part is Accu-Tech now. I am just presuming that they have the P74 formula around still and could bring them back. Probably won't and just stick with their Med Preps and Derma-Gard blades.
And we don't want to use the Derma-Gards as the edges are wrapped to let them ride above the skin and not cause any skin scraping. Good for sensitive skin prep in the hospital, but not for us. They'd probably never wear out though.
Stan
Yep.Good Old Personna. They split more ways than a Uranium atom. Then, the parts bought and sold and the US part is Accu-Tech now. I am just presuming that they have the P74 formula around still and could bring them back. Probably won't and just stick with their Med Preps and Derma-Gard blades.
And we don't want to use the Derma-Gards as the edges are wrapped to let them ride above the skin and not cause any skin scraping. Good for sensitive skin prep in the hospital, but not for us. They'd probably never wear out though.
Stan
- Thread starter
- #12
The article and video said that the razor gets messed up the most by the follicle when it is hitting it at an angle.
Other than the increased thickness of the blade, I wonder if this is why Injector blades last so much longer.
The angle is much closer to zero.
Other than the increased thickness of the blade, I wonder if this is why Injector blades last so much longer.
The angle is much closer to zero.
