Thread: Lapping Norton 4K/8K to get rid of "Grainyness"

Dear Fellow Razorheads. Have not honed a razor yet, but would like to try a dull Golden Monkey blade on my new stones, as it is not shave ready, I don't have any dull vintage blades and a Cromium Oxide Diamond slurry felt pad and a Big Daddy strop have not helped. Also, I noticed that one of the honemeisters recommends using a lapping stone on the Norton 4K/8k to get rid of the stones "grainyness"and am wondering if this is mandatory. FWIW, I have a Diamond D8C lapping stone, a Norton 220/1K, 4K/8K stone set, a Naniwa 12K superstone, a Big Daddy Strop, a .5 K Diamond Slurry felt pad, a Cromium Oxide Balsa Pad, a Bridle/Latigo leather paddle and a quality strop that will have the leather side covered with Chromium Oxide. I reaize that these Golden Monkeys are not the best, but supposedly can take an hone and be used. I just bought it as a practice blade to "hone" my sharpening skills FWIW, I have gotten a decent stropping technique down and have been maintaining the edge on my vintage Hamburg Circle and later production Cowboy brand Solingen blade. Lastly, I have not presoaked my Nortons but understand that a 15 minute pre soak is adequate. Any assistance greatly appreciated-Gearhead

Your Norton should be lapped before use. Any granularity on the 4k side needs to be removed. It's unlikely that the 8k side will need anything beyond simple flattening and edge rounding. The DMT you have will work very well as a lappng plate.

As I am sure you have read, some Nortons take a ton of preparatory lapping (up to about an eighth of an inch taken off the 4k). Mine was like that, but some members report that theirs didn't take much work at all. Generally the porosity/granularity issue can be traced to certain production sources of hones, but not always.

After you finish lapping don't overlook radiusing the long edges of the hone just slightly. This will help prevent damage to your blade.

Dear Bill S-Thanx for the detailed reply! Does a person just lap until the graininess is gone? How do you radius the corners and edges? Just slightly? I guess that the effectiveness of the Norton 4K is compromised until it's smooth?
FWIW, I had to hone the blade 3 cycles through the 4/8K Norton and 12K Naniwa, and then 20 on the felt and 40 on the Big Daddy Bridal leather strop-SUCCESS! Not the smoothest of shaves but it works! Did not radius the Norton stone yet, as I had not read the post yet. Great forum!-John

The white side needs to be smooth ti use or it will chip the edge of the razor and leave unsatisfactory results. You should be able to shave off the yellow side easily if you're done. I just did it this morning and I am smooth shaven.

Do not go to the yellow side until you are truly finished honing on the white side, it takes practice to know but a good indicator is if you see black building up quickly on the yellow side then you werent done on the white side and you need to go back.

Good luck!

Hey gearhead-Yeah, I wouldn't touch another razor to ANY hone until its edges are radiused/chamfered. If you want to make sure those hones are truly flat, grid-mark them with a pencil about every inch or so, then do light figure-eights on them with that diamond plate under running water until marks are gone evenly across the hone-corners too!

THEN gently scrape off the edges and corners of each stone by going long-ways and across, with the diamond plate at a roughly 45-degree angle to the top of the stone. you want to sort of round off the edges so that they don't catch a blade and ruin your efforts. Your final result will probably look better than this crappy i-phone pic, but I hope the idea comes across:

No, I don't hone on ice-I just needed good light for the photo this morning, so laid the Norton out on the sheet of sleet that fell here yesterday-now I'm awake!

Dear Bill, Disburden and ScoutHiker Dad (and let us NOT forget the originally mentioned honemeister )-THANK YOU! Although not perfect, the Golden Monkey shaved well today.
Already made a copy of these lapping instructions for my straight razor mnt. notebook and getting ready to take the DMT D8C to the Norton 4K/8K Am wondering if I could use a 1/16" pane of glass to check for flatness on the Norton.
How do I determine when the pencil grid marks are gone evenly? Do you mean that they should all vanish simultaneously? Otherwise, the flatness of the 4K could be compromised, correct? Do I need to soak the Norton 4K/8K for 15 minutes prior to flattening with the DMT D8C? Please explain.
Again, thanx again for all of the detailed feedback. Great forum!