Potentially daft question about injector blades

riverrun

riverrun

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pjgh said:
Right, sharp bit forwards and omote upwards ...

Interesting, Andreas. I can actually see something there, but not quite sure what but it does look asymmetrical. I think we are erring on the side of that there is a top and a bottom to these blades. I wonder if I should try to release that vintage Schick Krona Edge and try it the other way up. Damn thing won't shave me.
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I'll have another look at the blade tomorrow with a better microscope, but I won't be able to take pictures. I'll let you know my findings. The more I look at the picture, the more I think its symmetrical and just not photographed straight on.
 
OP
pjgh

pjgh

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With other vintage blades, I've often stropped them and they've played well ...

How do you strop an injector blade? I've injected it and hand stropped with some alcohol on my hand. I've pushed it out, flipped it over, re-injected it and done the same. Fingers crossed ... I'll try again tomorrow.
 
Fergiebilly

Fergiebilly

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pjgh said:
Potentially daft question, but I always say no question is daft if you don't know the answer and all questions raised present the opportunity for self-deprecation and so others to pipe in with "I always wondered that" ...

Anyway, do injector blades have to be inserted one way ... as in is it possible if you've been given a generous slip of single blades cellotaped to a postcard is it possible to put them in upside down?

I've repacked a Personna magazine with blades and just wanted to check I've not potentially packed them in upside down. I've also dropped a vintage Schick Krona Edge into my Golden 500 and it's rough as a Durham dog dresser. I was especially careful not to dull it when slipping it into the magazine for inserting into the razor and especially careful not to dull it on the blade stops when inserting into the razor.

Thoughts?
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Injector blades only GO in ONE CORRECT WAY..If you put it in upside down you are SNOOKERED..No Bones about that..Moreover..Those Dutch Krona Blades are NOT Carbon..:eek:

Billy
 
Fergiebilly

Fergiebilly

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DSC_0241_zpsfnkdwbre.jpg
 
UKRob

UKRob

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I'm not sure if I fully understand the issue here, but if the question is aimed at - should the bevel only be applied from a specific side - I would say it makes no difference. If the bevel on these blades is asymmetrical, the differences in angle from one side to the other will be minor and easily compensated by a slight change in the razor angle used.

A similar argument exists around Japanese Kamisori razors - you can use both sides with no problem and I've yet to hear anyone say they can tell the difference.
 
Fergiebilly

Fergiebilly

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UKRob said:
I'm not sure if I fully understand the issue here, but if the question is aimed at - should the bevel only be applied from a specific side - I would say it makes no difference. If the bevel on these blades is asymmetrical, the differences in angle from one side to the other will be minor and easily compensated by a slight change in the razor angle used.

A similar argument exists around Japanese Kamisori razors - you can use both sides with no problem and I've yet to hear anyone say they can tell the difference.
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The difference is only Minor Rob..I have noticed a difference though depending on the Coating..The Krona Blade that he is talking about has an Unusual Teflon Coating & a So Called Krona Edge & it sure does make a Difference with them..:)

Billy
 
riverrun

riverrun

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I have had another look under a microscope at the edge of the blade and have come to two conclusions:
  • The blade edge is perfectly symmetrical when viewed from the side.
  • If you are not looking straight onto the edge of the blade, you get the effects seen in the photo I posted earlier. Sorry.
As Billy said, there may be a difference in coating, but I'm not going to do a blind test. :D
 
Fergiebilly

Fergiebilly

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riverrun said:
I have had another look under a microscope at the edge of the blade and have come to two conclusions:
  • The blade edge is perfectly symmetrical when viewed from the side.
  • If you are not looking straight onto the edge of the blade, you get the effects seen in the photo I posted earlier. Sorry.
As Billy said, there may be a difference in coating, but I'm not going to do a blind test. :D
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You are correct Andreas ..I can see that with the naked eye..I have found the same as you..I have also done this to myself that's how I know..Whether that applies to them all with various coatings I cant be certain but I never take the chance.:)

Billy
 
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