When convex sharpening...

SC_Dave said:
Last night I got out my DMT plates in an attempt to thin the edge as suggested. Using sharpie radial lines as Martin did in his vid helped significantly in letting me know where my work was. I worked one side checking it often, then looked at the edge straight on and could clearly see I had reduced the shoulder on that side. Flipped to the other side and did the same until I had them equal. Honestly at that point I decided to try to move on to sharpening on the plates. I worked slow in short strokes using a slight rocking motion. Worked my way through C to EEF then stropped. To my satisfaction I got it very sharp. I'll try to post some pics and maybe a vid tonight. If you score points for aesthetics I won't do well as the plates left shiny swirly marks on the cheek. I'm not sure if I want to try to remove these or consider it just part of the sharpening process.
David
Click to expand...

If you use a bit of oil it can help blending the scratch facets. This is why most prefer waterstones or SIC stones with oil for that sort of work as it makes the cosmetics a lot prettier. Still you have learned a fundamental concept - by using a hard stone you can shape the curve exactly to the arc you want, it is not dependent on various densities of backing necessitating careful tweeking of applied force.

A good way to blend it all together after the fact is some honing compound on a sheet of paper with another sheet (two at most) underneath it - wrap around a stone and strop away using a bit of wrist roll - it will blend the hatching very quickly. Radial Sharpie marks can actually allow you to cosmetically polish right up the apex without effecting it if you'd rather not. Since you're only cosmetically polishing, you can apply a fair amount of force without any edge degradation. Convex edge geometry with DMT plate cutting apex.

Good job!
 
HeavyHanded said:
If you use a bit of oil it can help blending the scratch facets. This is why most prefer waterstones or SIC stones with oil for that sort of work as it makes the cosmetics a lot prettier. Still you have learned a fundamental concept - by using a hard stone you can shape the curve exactly to the arc you want, it is not dependent on various densities of backing necessitating careful tweeking of applied force.

A good way to blend it all together after the fact is some honing compound on a sheet of paper with another sheet (two at most) underneath it - wrap around a stone and strop away using a bit of wrist roll - it will blend the hatching very quickly. Radial Sharpie marks can actually allow you to cosmetically polish right up the apex without effecting it if you'd rather not. Since you're only cosmetically polishing, you can apply a fair amount of force without any edge degradation. Convex edge geometry with DMT plate cutting apex.

Good job!
Click to expand...

Thanks Martin!
 
Worked on it a little more trying to get out the facets from sharpening. Taking HH's advice but instead of compound on paper I used 2000 grit sand paper, I put the radial line back on too insure I didn't foul my edge.

image_zps4febff41.jpg


After a while I had most of the swirls and facets out. You can still see the makers grind marks but they will eventually disappear. Its not perfect, and honestly the swirls and facets didn't bother me I just wanted to see if I could work them out.

image_zps7d4dfd32.jpg


All I had to test the sharpness with was copy paper.

[video]http://vid282.photobucket.com/albums/kk247/SC_Dave/Mobile%20Uploads/trim24149ECF-1465-4FC2-A587-EB0F4EEC0364_zpsa4bb05f5.mp4[/video]
Don't know embed a vid, sorry.


I really want to thanks David, Chris and Martin for all the help you have given me. I still want to learn to do it with a soft backing and sandpaper but I'm really pleased with what I've been able to accomplish.
David
 
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