Noob question. Do all japanese knives come with vinyl coating? I got a sugimoto 6 more in text

[dassomi]

Hi all

So I just read that japanese knives come with a coating which needs to be removed before first use.
-I just cleaned it with soapy water but that isn't apparently enough.
-Does the Sugimoto also come with it it was oily but that got removed with soapy water
-is it dangerous if I didn't remove it completely, already used it
-can I remove it with alcohol?

Thanks for the help

 

[sansho]

only some japanese knives have a coating. try removing with acetone.

 

[dassomi]

only some japanese knives have a coating. try removing with acetone.

How can I know if mine has thsi type of coating. I can't find anything online and I didn't find anything in the instructions

 

[sansho]

by taking a picture and asking someone? or seeing if it comes off with organic solvent i guess

 

[dassomi]

 

[dassomi]

The last picture is after I used.
I used it to cut onions and if I'm not mistaking the smudges are patina forming?

 

[sansho]

 

[martchap]

The last picture is after I used.
I used it to cut onions and if I'm not mistaking the smudges are patina forming?

YES! Patina beginning. Different foods cause varying colors (though not a wide variety). Onion is typically brownish. Cutting protein, like fish, chicken, steak, or even sharp cheddar will often cause a bluish patina (my fav)—which sometimes only shows up on the blade as you wash and dry it.