It is common for the bevel angle to change slightly towards the tip of the blade. It can be seen with magnification. This can be frustrating when trying to sharpen the entire blade at one angle. For this reason, I will sometimes use a stone "file" to sharpen scissors because it is easier to alter the angle of the file during the stroke as it reaches the tip than it is to alter the angle of the scissors on the stone over a sharpening stroke.
It is a stone made to be used as a file--I think they are more commonly called "abrasive files". Spyderco sells ceramic files but they are very fine--too fine to remove a lot of metal. If you search the internet for india abrasive file or abrasive file there should be some good results.
@@johnksa4973 like them? www.google.com/search?q=abrasive+files&client=firefox-b-d&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjL7eGu3oDjAhVTa94KHfY1AuYQ_AUIECgB&biw=1353&bih=664
Yes. I didn't know we could use links.www.falcontool.com/PublicStore/catalog/India-Abrasive-Files,139.aspx -- www.nortonabrasives.com/en-us/abrasive-files -- www.apex-schleifmittel.de/de/english/abrasives_SILAP.htm
I usually use #220 rough stone "Arato-kun" and #400 middle-rough stone (no name) and #700 "bester" and #2000 "bester" for this kind of scissors. sometime I use another stones, sometime I don't use some of them. case by case.