Blade Sharpness Research Project

[helicopter]

This is the Personna Med Prep blade, which was made in the Verona, Virginia AccuTec plant and labeled and packaged for medical use. It is an expensive version of the blade, so I got a few of them in a little ziplock from RBC. It looks the same as the lab blue, but the outer box is different. I think I have seen mentions of it being a sterilized or uncoated version of their standard blade. I can't say if it is sterilized, but it is definitely coated.

It is an unmarked Personna blade. It looks the same as AccuForge and the 100-pack lab blues.

I suspect these are made of American National Aerospace Standard (NAS) 0.004" steel, since they seem to measure slightly thicker than the standard metric 100 micron blades. It is within the margin of error for a single blade due to how processing may change the thickness slightly, but we have measured several of these, and that is the trend.

Coating and Grind
Coating Thickness	Light
Coating Evenness	Even
Bevel Coating Coverage	31%
Entire Bevel to Edge, mm	0.424
Primary Bevel Scratch Size	0.003
Primary Bevel Scratch Consistency	Typical
Primary Bevel Proximal Transition	Even
Blade Thickness, mm	0.102
Secondary Bevel Transition to Edge, mm	0.107
Secondary Bevel Scratch Size	0.002
Secondary Bevel Scratch Consistency	Typical
Secondary Bevel Transition Line	Typical
Tertiary Bevel Transition to Edge, mm	0.030
Tertiary Bevel Scratch Size	Polish
Tertiary Bevel Scratch Consistency	Even
Tertiary Bevel Scratch Transition Line	Typical

This blade held up to testing remarkably well. After testing, there is some very fine shipping at the apex.

The coating had more impact on initial sharpness than the standard Lab Blue I tested. I suppose it is possible that it is sterilized in some way that changes the coating slightly. That said, I wouldn't consider purchasing this over the regular Lab Blue due to the substantial price difference.

Sharp and durable, it is an excellent blade. However, you are better off to get the regular one in a dispenser or 100-pack, due to the pricing.

Date	18-Sep-2024
Blade	AccuTec	Personna	Med Prep	United States	1-Jan-2024
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom / Top	Bottom / Top	Bottom / Top	Bottom / Top	Bottom / Top
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	20	20	20	20	20
Adj. Std. Dev.	11	4	5	6	7
Median F (g)	46	41	43	43.5	44
Mean F (g) Top	40	39	42	44	48
Mean F (g) Bottom	56	43	43	44	43
Mean F (g)	48	41	43	44	46
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Avg. Adj. F (g) Top	49	48	51	54	58
Avg. Adj. F (g) Bottom	69	52	53	54	53
Median Adj. F (g)	56	50	52	53	54
Mean Adj. F (g)	59	50	52	54	56

Blade Sharpness Test Index

 

[Flanders]

The coating had more impact on initial sharpness than the standard Lab Blue I tested. I suppose it is possible that it is sterilized in some way that changes the coating slightly. That said, I wouldn't consider purchasing this over the regular Lab Blue due to the substantial price difference.

Well, this matches my perception of their sharpness at least. I suspect they have a thicker coating because they are going to be used to prep an area for surgery and not pre-cutting the area is probably important. Plus they are only used once.

 

[helicopter]

This is the AccuThrive super stainless blade, which is produced by AccuTec in their Verona, Virginia plant under their own brand for medical use. It is laser engraved with a date code, country of origin, product, and brand, which I am excited to see. AccuTec representatives have said this is identical to the Personna Med Prep, and I have no reason to doubt them.

I just got a few of these from RBC to compare to the others. It has special wrapper printing as well.

The printing on the back side of the blade didn't come out quite as nicely.

The polymer coating looks a little heavier on this example.

Coating and Grind
Coating Thickness	Moderate
Coating Evenness	Even
Bevel Coating Coverage	75%
Entire Bevel to Edge, mm	0.448
Primary Bevel Scratch Size	0.004
Primary Bevel Scratch Consistency	Typical
Primary Bevel Proximal Transition	Even
Blade Thickness, mm	0.103
Secondary Bevel Transition to Edge, mm	0.116
Secondary Bevel Scratch Size	0.002
Secondary Bevel Scratch Consistency	Typical
Secondary Bevel Transition Line	Typical
Tertiary Bevel Transition to Edge, mm	0.026
Tertiary Bevel Scratch Size	Polish
Tertiary Bevel Scratch Consistency	Even
Tertiary Bevel Scratch Transition Line	Typical

This one didn't want to give us as nice a curve as the Med Prep. There were a few spots that dulled faster than the rest of the top edge and they contribute some noise to the data as I am sampling random spots along the edge. The initial drop in sharpness is more similar to the Lab Blue shown here. I suspect they are all the same or essentially the same, and if they are different, it doesn't matter enough for me to do anything other than get whichever is packaged best or cheapest.

Date	18-Sep-2024
Blade	AccuTec	AccuTec	AccuThrive	United States	17-May-2024
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom / Top	Bottom / Top	Bottom / Top	Bottom / Top	Bottom / Top
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	20	20	20	20	20
Adj. Std. Dev.	5	4	7	12	12
Median F (g)	46	44	43	46.5	45.5
Mean F (g) Top	46	44	46	51	50
Mean F (g) Bottom	47	44	42	47	44
Mean F (g)	46	44	44	49	47
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Avg. Adj. F (g) Top	56	54	56	63	61
Avg. Adj. F (g) Bottom	57	54	52	58	54
Median Adj. F (g)	56	54	52	57	56
Mean Adj. F (g)	57	54	54	60	58

Blade Sharpness Test Index

 

[BigAlVista]

Hey, everyone. I've consolidated the data again and have updated my Excel model, it's a few blades behind, but is pretty close to current (up through Sept 8th data). Again, I'm posting this as a .zip file. Please let me know if you have any issues using it.

 

[helicopter]

There is a lot of information about the current AccuTec and American Personna blades on the AccuTec website. They are all made from the same 0.004" chrome stainless steel, with the same 3-facet grind. Most of them specify that they have a coating, and the website indicates there is just one coating process for thin and sharp blades like this.

There could be one that isn't coated, but it isn't mentioned in the description if that is the case. I think they probably are all coated.

The only specified differences in the actual blades are in whether the blade has fingerprint oil, or is degreased to avoid contamination in lab and industrial environments. I wouldn't seek the degreased blades for shaving at home.

All of the other differences are in packaging, branding, and target markets. For dust-free lab environments, they produce blades in big paper-free dispensers. I would consider all of the ones available in paper wrappers to be essentially the same, except for packaging. The ones in cardboard boxes are better for the environment, and the dispensers might protect the baldes better, resulting in a sharper blade when it reaches the end user.

I have a couple more here, but I am not sure they are worth testing right away. Once is a "Lab Blue" in a dark blue wrapper from RBC and the other is a 100-pack blade with no date code from Blackland. They were both purchased within the last few weeks. I am guessing the ones from Blackbird were produced in May to August, since I tested blades from April that had a date. I am really disappointed that they would remove the date code from the Comfort Coated (Lab Blue) 100-Pack when they are using the same machinery that can laser print a date on the blade or ink print the inside of the box flap. The laser printing of the logo, product, and date, like we have with the AccuThrive I tested is ideal, but putting a date inside the box is a basic expectation.

 

[Sweeney_]

There is a lot of information about the current AccuTec and American Personna blades on the AccuTec website. They are all made from the same 0.004" chrome stainless steel, with the same 3-facet grind. Most of them specify that they have a coating, and the website indicates there is just one coating process for thin and sharp blades like this.

There could be one that isn't coated, but it isn't mentioned in the description if that is the case. I think they probably are all coated.

The only specified differences in the actual blades are in whether the blade has fingerprint oil, or is degreased to avoid contamination in lab and industrial environments. I wouldn't seek the degreased blades for shaving at home.

All of the other differences are in packaging, branding, and target markets. For dust-free lab environments, they produce blades in big paper-free dispensers. I would consider all of the ones available in paper wrappers to be essentially the same, except for packaging. The ones in cardboard boxes are better for the environment, and the dispensers might protect the baldes better, resulting in a sharper blade when it reaches the end user.

View attachment 1913816

I have a couple more here, but I am not sure they are worth testing right away. Once is a "Lab Blue" in a dark blue wrapper from RBC and the other is a 100-pack blade with no date code from Blackland. They were both purchased within the last few weeks. I am guessing the ones from Blackbird were produced in May to August, since I tested blades from April that had a date. I am really disappointed that they would remove the date code from the Comfort Coated (Lab Blue) 100-Pack when they are using the same machinery that can laser print a date on the blade or ink print the inside of the box flap. The laser printing of the logo, product, and date, like we have with the AccuThrive I tested is ideal, but putting a date inside the box is a basic expectation.

The two 100ct boxes I received recently from Blackland were undated also so I'd like see one tested eventually. They were packaged well and I'm not overly concerned based on testing that you've performed previously.

In fact, of the 5 boxes of comfort coated that I have stocked, only the Energizer/Personna in the blue/yellow box are dated on the flap (2015). I think all my Accutec/Personna in the blue/white boxes are laser printed (need to check that again) but have no idea when that began.

 

[helicopter]

The two 100ct boxes I received recently from Blackland were undated also so I'd like see one tested eventually. They were packaged well and I'm not overly concerned based on testing that you've performed previously.

In fact, of the 5 boxes of comfort coated that I have stocked, only the Energizer/Personna in the blue/yellow box are dated on the flap (2015). I think all my Accutec/Personna in the blue/white boxes are laser printed (need to check that again) but have no idea when that began.

Might as well take a look now while I'm on a roll, then.

 

[helicopter]

These are the Personna Comfort Coated blades I recently got from Blackland. They arrived with the boxes in pristine condition, due to careful packing at Blackland. We can reasonably assume they were made between May to August, 2024, but they don't have a date code.

A date code and production location are useful for understanding products in analysis like this, but they are also a signal to consumers that the maker is confident in the quality of the work they did for that batch. They believe the product is as good as the products produced in the past, and that they will continue making things just as well or better in the future.

The same thing goes for being confident in your specific location, facility, and workforce, which is still indicated on this batch. Here, AccuTec is proud to have made the blade in their Verona, Virginia facility, but they don't say when they made it, missing an opportunity to signal their confidence in the quality of the product at the time they produced this specific batch.

I have measured eleven blades from the Verona plant, and among the ten that were produced in the last decade, this one is the least sharp. It is only sharper than the one from 2013. Take that how you will.

Coating and Grind
Coating Thickness	Moderate
Coating Evenness	Even
Bevel Coating Coverage	41%
Entire Bevel to Edge, mm	0.399
Primary Bevel Scratch Size	0.003
Primary Bevel Scratch Consistency	Typical
Primary Bevel Proximal Transition	Even
Blade Thickness, mm	0.100
Secondary Bevel Transition to Edge, mm	0.117
Secondary Bevel Scratch Size	0.002
Secondary Bevel Scratch Consistency	Typical
Secondary Bevel Transition Line	Typical
Tertiary Bevel Transition to Edge, mm	0.038
Tertiary Bevel Scratch Size	Polish
Tertiary Bevel Scratch Consistency	Even
Tertiary Bevel Scratch Transition Line	Typical

We see that big initial drop in cutting force again like the Med Prep. Maybe they changed the coating at some point this summer.

Date	19-Sep-2024
Blade	AccuTec	Personna	Comfort Coated	United States	1-Jun-2014
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom / Top	Bottom / Top	Bottom / Top	Bottom / Top	Bottom / Top
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	20	20	20	20	20
Adj. Std. Dev.	9	3	3	6	6
Median F (g)	55.5	48	48	47	49
Mean F (g) Top	54	48	48	45	47
Mean F (g) Bottom	58	48	48	51	52
Mean F (g)	56	48	48	48	49
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Avg. Adj. F (g) Top	66	58	58	55	57
Avg. Adj. F (g) Bottom	71	59	58	62	63
Median Adj. F (g)	68	59	59	57	60
Mean Adj. F (g)	68	59	58	59	60

They're all pretty sharp. This one gave me a pretty J-shaped curve, at least.

It's still quite competitive. It is actually very close to the April, 2024 blade if you ignore the initial effect of the coating. I am happy to have another 199 of these, even though I would like to see the performance of the 2022 and 2023 blades I tested, and I would like to see date codes.

Blade Sharpness Test Index

 

[Sweeney_]

@helicopter Bravo Sir, bravo.

 

[helicopter]

Here we have the Feather Professional Super Artist Club blade. This is the aggressive AC blade. It is thicker and taller than the standard Professional Blade I measured previously, so it has more blade exposure.

It iactually wasn't as sharp as the Professional Super, though I suspect the grind is the same and it is just batch vatiation.

It looks like the same grind. The coating looks a little bit different, and measurements also indicated it might be different, though it wouldn't surprise me if it is just batch variation.

The steel is thicker. I measured a blade height of 8.161mm, which is consistent with their published specification of 8.2mm.

Coating and Grind
Coating Thickness	Heavy
Coating Evenness	Even
Bevel Coating Coverage	54%
Entire Bevel to Edge, mm	1.284
Primary Bevel Scratch Size	0.005
Primary Bevel Scratch Consistency	Even
Primary Bevel Proximal Transition	Even
Blade Thickness, mm	0.314
Secondary Bevel Transition to Edge, mm	0.223
Secondary Bevel Scratch Size	0.002
Secondary Bevel Scratch Consistency	Even
Secondary Bevel Transition Line	Even
Tertiary Bevel Transition to Edge, mm	0.046
Tertiary Bevel Scratch Size	Polish
Tertiary Bevel Scratch Consistency	Even
Tertiary Bevel Scratch Transition Line	Typical

It didn't have the linear-exponential wear curve of the Feather PB AC and Feather DE. It is a typical J-shaped curve. When you use of of these in a shavette, it is continually obvious you could cut an apple in half with it. I am not sure how important its ranking compared to DE blades actually is, but it is interesting to see that they are not nearly as sharp as they feel.

Date	19-Sep-0204
Blade	Feather	Professional Super	Artist Club	Japan	1-Jan-2024
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom	Bottom	Bottom	Bottom	Bottom
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	15	15	15	15	14
Adj. Std. Dev.	5	8	6	8	14
Median F (g)	53	52	52	56	57
Mean F (g)	54	51	51	56	61
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Median Adj. F (g)	65	63	63	68	70
Mean Adj. F (g)	65	62	63	68	75

Blade Sharpness Test Index

 

[Ron R]

These are the Personna Comfort Coated blades I recently got from Blackland. They arrived with the boxes in pristine condition, due to careful packing at Blackland. We can reasonably assume they were made between May to August, 2024, but they don't have a date code.

A date code and production location are useful for understanding products in analysis like this, but they are also a signal to consumers that the maker is confident in the quality of the work they did for that batch. They believe the product is as good as the products produced in the past, and that they will continue making things just as well or better in the future.

The same thing goes for being confident in your specific location, facility, and workforce, which is still indicated on this batch. Here, AccuTec is proud to have made the blade in their Verona, Virginia facility, but they don't say when they made it, missing an opportunity to signal their confidence in the quality of the product at the time they produced this specific batch.

I have measured eleven blades from the Verona plant, and among the ten that were produced in the last decade, this one is the least sharp. It is only sharper than the one from 2013. Take that how you will.

View attachment 1913885

View attachment 1913886

Coating and Grind
Coating Thickness	Moderate
Coating Evenness	Even
Bevel Coating Coverage	41%
Entire Bevel to Edge, mm	0.399
Primary Bevel Scratch Size	0.003
Primary Bevel Scratch Consistency	Typical
Primary Bevel Proximal Transition	Even
Blade Thickness, mm	0.100
Secondary Bevel Transition to Edge, mm	0.117
Secondary Bevel Scratch Size	0.002
Secondary Bevel Scratch Consistency	Typical
Secondary Bevel Transition Line	Typical
Tertiary Bevel Transition to Edge, mm	0.038
Tertiary Bevel Scratch Size	Polish
Tertiary Bevel Scratch Consistency	Even
Tertiary Bevel Scratch Transition Line	Typical

View attachment 1913887

We see that big initial drop in cutting force again like the Med Prep. Maybe they changed the coating at some point this summer.

View attachment 1913896

Date	19-Sep-2024
Blade	AccuTec	Personna	Comfort Coated	United States	1-Jun-2014
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom / Top	Bottom / Top	Bottom / Top	Bottom / Top	Bottom / Top
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	20	20	20	20	20
Adj. Std. Dev.	9	3	3	6	6
Median F (g)	55.5	48	48	47	49
Mean F (g) Top	54	48	48	45	47
Mean F (g) Bottom	58	48	48	51	52
Mean F (g)	56	48	48	48	49
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Avg. Adj. F (g) Top	66	58	58	55	57
Avg. Adj. F (g) Bottom	71	59	58	62	63
Median Adj. F (g)	68	59	59	57	60
Mean Adj. F (g)	68	59	58	59	60

They're all pretty sharp. This one gave me a pretty J-shaped curve, at least.

View attachment 1913895

It's still quite competitive. It is actually very close to the April, 2024 blade if you ignore the initial effect of the coating. I am happy to have another 199 of these, even though I would like to see the performance of the 2022 and 2023 blades I tested, and I would like to see date codes.

View attachment 1913903
Blade Sharpness Test Index

Some excellent information on the Personna brand of razor blades + Accu tec blades. Thanks for the information + great blade project IMO!


https://www.badgerandblade.com/foru...asurement-data-and-index.655294/post-12833247

 

[helicopter]

Today I got this GSG Renewed Dovo "Flowing" Grenadille Wood Handle 6/8 Etched Full Hollow Solingen Straight Razor honed and shave ready from Griffith Shaving Goods. I took a picture of the edge and measured its sharpness, since GSG has a reputation for excellent work, and I want a benchmark for future comparison of my own honing, other razors, and such.

These are razors that had some sort of problem like damage or return, and GSG fixed them up with their renewal process. It is a beautiful thing to behold.

Coating and Grind
Entire Bevel to Edge, mm	0.351
Primary Bevel Scratch Size	0.004
Primary Bevel Scratch Consistency	Even
Primary Bevel Proximal Transition	Even
Secondary Bevel Transition to Edge, mm	0.114
Secondary Bevel Scratch Size	Polish
Secondary Bevel Scratch Consistency	Even
Secondary Bevel Transition Line	Even

Date	19-Sep-0204
Blade	Dovo
Wear on Edge	0
Edges Measured	Bottom
Measurement Medium	Stren 6 .22
Dulling Substrate	New
Measurements	20
Adj. Std. Dev.	7
Median F (g)	64
Mean F (g)	64
BESS Adj. Factor	1.22
Median Adj. F (g)	78
Mean Adj. F (g)	78

Without artificial wear, which is not something I am considering, it isn't really comparable. I am not going to add it to my charts, but the data will be deposited, and it may get pulled into @BigAlVista 's charts.

Blade Sharpness Test Index

 

[helicopter]

This is the Feather Professional Light Blade, the least aggressive of the three unguarded Feather Artist Club blades. They make it more mild by reducing exposure with a shorter blade. Feather says it is 7.4mm tall, and mine measures 7.34mm. It has so little blade exposure that I couldn't cut paper with it in the shavette, so I had to hold it by hand. Part way through testing like this, I found that I could clamp it low in the shavette, increasing exposure and reducing cutting force. I ended up re-starting the test with the blade partially clamped for extra exposure. I need to revisit the other two AC blades I have tested to see if this changes the results. Subjectively, I thought the Feather Professional AC should have been sharper than the measurements indicated.

The grind looks about the same as the others. You can see that tertiary transition line through the coating if you know to look for it there.

Coating and Grind
Coating Thickness	Heavy
Coating Evenness	Even
Bevel Coating Coverage	45%
Entire Bevel to Edge, mm	1.032
Primary Bevel Scratch Size	0.003
Primary Bevel Scratch Consistency	Even
Primary Bevel Proximal Transition	Even
Blade Thickness, mm	0.257
Secondary Bevel Transition to Edge, mm	0.124
Secondary Bevel Scratch Size	0.003
Secondary Bevel Scratch Consistency	Even
Secondary Bevel Transition Line	Even
Tertiary Bevel Transition to Edge, mm	0.045
Tertiary Bevel Scratch Size	Polish
Tertiary Bevel Scratch Consistency	Even
Tertiary Bevel Scratch Transition Line	Typical

Date	20-Sep-2024
Blade	Feather	Professional Light	Artist Club	Japan	1-Jan-2024
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom	Bottom	Bottom	Bottom	Bottom
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	15	15	15	15	15
Adj. Std. Dev.	3	3	3	4	5
Median F (g)	40	42	43	46	47
Mean F (g)	41	42	43	46	47
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Median Adj. F (g)	49	51	52	56	57
Mean Adj. F (g)	50	51	53	56	57

This is much more consistent with the Feather DE. It will be interesting to see if more exposure changes the others.

Ooh Yeah! Nice!

Blade Sharpness Test Index

 

[helicopter]

I re-measured the AC Feather Professional Blade and the AC Feather Super using the special process I came up with for the AC Feather light, to see if it changed the results reducing cutting force for these blades like it did for the AC Feather Light.

It did not. They are both fairly similar, and less sharp. It makes sense because they had enough blade exposure in the first test, and the paper cuts are probably harder on the edge without the support of the shavette. I will keep the special process only for mild AC blades that can't cut paper in the shavette. If there were more than a handful of these, I would just trim a shavette, but I don't think its worth it since I think it is just the Feather light and possibly the mild Kai.

Date	20-Sep-2024
Blade	Feather	Professional Blade	Artist Club	Japan	1-Jan-2024
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom	Bottom	Bottom	Bottom	Bottom
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	15	15	15	15	15
Adj. Std. Dev.	4	4	4	5	8
Median F (g)	50	52	54	56	58
Mean F (g)	51	51	54	58	58
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Median Adj. F (g)	61	63	66	68	71
Mean Adj. F (g)	62	62	66	70	70

Date	20-Sep-2024
Blade	Feather	Professional Super	Artist Club	Japan	1-Jan-2024
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom	Bottom	Bottom	Bottom	Bottom
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	15	15	15	15	15
Adj. Std. Dev.	5	4	6	5	7
Median F (g)	52	52	57	60	62
Mean F (g)	52	53	57	61	61
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Median Adj. F (g)	63	63	70	73	76
Mean Adj. F (g)	64	64	69	74	75

I think we can call this process good enough for the Light and ignore it for the other two.

 

[helicopter]

Here is another Artist Club style blade, the Schick Proline. It is made for the Japanese market and this P-20 Version comes in a dispenser with ten blades. There is also a 30 blade dispenser, the P-30, which people say is the same blade. These are available for under $100/300 on eBay from Japan, which is inexpensive for an AC blade. Maybe one of you can say where it is manufactured.

For whatever reason, the keyholes are slightly different from the Feather AC blades. It fits in my Feather kamisori shavette without any issues.

It is a different grind from the Feathers. The proportions look like an Edgewell blade and remind me of DE Schick blades.

The coating is persistent, and the edge is durable.

It has a good height providing exposure similar to Feather Professional AC.

Coating and Grind
Coating Thickness	Heavy
Coating Evenness	Even
Bevel Coating Coverage	73%
Entire Bevel to Edge, mm	1.167
Primary Bevel Scratch Size	0.005
Primary Bevel Scratch Consistency	Even
Primary Bevel Proximal Transition	Even
Blade Thickness, mm	0.262
Secondary Bevel Transition to Edge, mm	0.222
Secondary Bevel Scratch Size	0.002
Secondary Bevel Scratch Consistency	Even
Secondary Bevel Transition Line	Even
Tertiary Bevel Transition to Edge, mm	0.043
Tertiary Bevel Scratch Size	Typical
Tertiary Bevel Scratch Consistency	Even
Tertiary Bevel Scratch Transition Line	Typical
Height, mm	8.074

It is sharper than the Standard and Super Feather Pro AC blades, but not as sharp as the Feather Professional Light AC blade. With its durable coating, it is very consistent. I don't think it would change noticeably in sharpness during the first week for many shavers. It is more durable and much more consistent than the Feathers tested.

Date	21-Sep-2024
Blade	Schick	Proline	Artist Club	Japan	1-Jan-2024
Wear on Edge	0	3	6	9	12
Edges Measured	Bottom	Bottom	Bottom	Bottom	Bottom
Measurement Medium	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22	Stren 6 .22
Dulling Substrate	New	Paper	Paper	Paper	Paper
Measurements	15	15	15	15	15
Adj. Std. Dev.	4	5	3	4	4
Median F (g)	49	48	47	49	50
Mean F (g)	48	48	47	48	51
BESS Adj. Factor	1.22	1.22	1.22	1.22	1.22
Median Adj. F (g)	60	59	57	60	61
Mean Adj. F (g)	59	58	57	59	62

Blade Sharpness Test Index

 

[Flanders]

Maybe one of you can say where it is manufactured.

We had a thread about these and the ones(B series) that come in a dispenser with a key(pricey). A poster that speaks Japanese insisted that they are all made in the US, accutec apparently, and exported to Japan. I will see if I have it in my bookmarks.

 

[helicopter]

We had a thread about these and the ones(B series) that come in a dispenser with a key(pricey). A poster that speaks Japanese insisted that they are all made in the US, accutec apparently, and exported to Japan. I will see if I have it in my bookmarks.

My translator indicated something about the US, but it wasn't clear. Direct Japanese translation can throw me off a bit. I do better with Chinese, which I studied for a few years in college. AccuTec would make sense since to me for several reasons, but of course, Edgewell's German plants, or something else also wouldn't have surprised me.

 

[Flanders]

My translator indicated something about the US, but it wasn't clear. Direct Japanese translation can throw me off a bit. I do better with Chinese, which I studied for a few years in college. AccuTec would make sense since to me for several reasons, but of course, Edgewell's German plants, or something else also wouldn't have surprised me.

Sorry for the misinformation, I am still having trouble finding the post I was looking for. I believe the thread was discussing the injector dispensers sold by Connaught and the question of origin came up and the usual chorus of people saying to just buy B-20s and re-pack them yourself. The implication was that all of these were made in the same factory. I am having a harder time than normal finding this one.

Here is another mention of them:

Baffling - Schick Injector blades for USA are made in China, Schicks for Japan made in USA

A strange state of affairs: The Schick injectors distributed in North America are made in China- But the Schick Injector blades made for the Japanese market, are made in USA. Available in single and twin blade versions- Can we assume that the Japanese blades are made by Personna? Not...

www.badgerandblade.com

This is starting to ring some bells, that they have to be exported and that's why they aren't sold in the US. But they could have shifted production to Germany since the original Proline thread(14 pages) from 2017.

 

[helicopter]

I didn't mean I think you are wrong. I am guessing with very little information. I know it isn't the same blade as the Feathers, and that's about it.

 

[Flanders]

I didn't mean I think you are wrong. I am guessing with very little information. I know it isn't the same blade as the Feathers, and that's about it.

Oh I know, I was beating myself up for posting before finding links! I still have that post about the fake Polsilvers in the back of my head informing my decisions whether to say something or keep it to myself. I usually have things bookmarked and was planning to edit my original post with the links.