Introducing the Richmond .25 Micron Diamond Spray. This 2oz spray contains 10 carats weight of polycrystalline diamond powder up to .25 micron in size. We also use a non-clumping formula for even application. To use this item simply spritz on your favorite strop 2-3 times and let it dry. It will last multiple stropping sessions so a little goes a long way. This is our secret weapon when sharpening knives for our customers. Once you try stropping with this spray you'll see why. You'll be smooth shaving and putting scary sharp edges on all your razors, kitchen knives, and tools. Stay Sharp!
Reviews
9 review(s) WRITE A REVIEW (Reviews are subject to approval) 0.25 Micron Diamond Spray, November 25, 2025 AMAZING - SUPER SHARPPosted By: Doug Longmire
37 people found this review helpful
I am a bit of a knifeknut, and sharpening (mainly Japanese) kitchen knives is a passion/hobby of mine.
These diamond sprays, used on ultra smooth pine planks (18" x 3"ay 1micron to .5 to .25. The .25 cut fine on it's own.
37 people found this review helpful
I am a bit of a knifeknut, and sharpening (mainly Japanese) kitchen knives is a passion/hobby of mine.
These diamond sprays, used on ultra smooth pine planks (18" x 3"ay 1micron to .5 to .25. The .25 cut fine on it's own.
Was this rating helpful to you? - verified customer
25 people found this review helpful
I finally 'treated' myself to a high quality pocket knife, and with that, I thought I would give stropping a go as well. My blade is made of M390 which I have heard would be a hard steel to sharpen. I just put a couple sprays on the smooth side of my strop and it took my edge to the next level. I expect the spray to last me years of sharpening before I need more. It really help cut the steel well, and only needed about 20 strokes on each side. Using just bear leather most likely would not have done much to that steel on it's own in a reasonable amount of time. Now I'm new to stropping and it's been a while since I've sharpened manually but the edge I got is able to push cut through paper, open letters like hot butter and cut hair. It is not straight razor sharp, but that could be due to my in experience, perhaps with some more practice I could get there with this spray. I'm now curious to try some of the finer grits here on the site but that will have to be a 'treat' for another time. :) Oh, and if this helps anyone further for the record I sharpened on the Spyderco Sharpmaker, then stropped on the rough side of the leather with some generic green polishing compound, then stropped on the smooth side with the diamond spray. After doing it this way I do not really feel a need to work my way down in diamond grits from say 1micron to .5 to .25. The .25 cut fine on it's own.
25 people found this review helpful
I finally 'treated' myself to a high quality pocket knife, and with that, I thought I would give stropping a go as well. My blade is made of M390 which I have heard would be a hard steel to sharpen. I just put a couple sprays on the smooth side of my strop and it took my edge to the next level. I expect the spray to last me years of sharpening before I need more. It really help cut the steel well, and only needed about 20 strokes on each side. Using just bear leather most likely would not have done much to that steel on it's own in a reasonable amount of time. Now I'm new to stropping and it's been a while since I've sharpened manually but the edge I got is able to push cut through paper, open letters like hot butter and cut hair. It is not straight razor sharp, but that could be due to my in experience, perhaps with some more practice I could get there with this spray. I'm now curious to try some of the finer grits here on the site but that will have to be a 'treat' for another time. :) Oh, and if this helps anyone further for the record I sharpened on the Spyderco Sharpmaker, then stropped on the rough side of the leather with some generic green polishing compound, then stropped on the smooth side with the diamond spray. After doing it this way I do not really feel a need to work my way down in diamond grits from say 1micron to .5 to .25. The .25 cut fine on it's own.
Was this rating helpful to you? - verified customer
25 people found this review helpful
I finally 'treated' myself to a high quality pocket knife, and with that, I thought I would give stropping a go as well. My blade is made of M390 which I have heard would be a hard steel to sharpen. I just put a couple sprays on the smooth side of my strop and it took my edge to the next level. I expect the spray to last me years of sharpening before I need more. It really help cut the steel well, and only needed about 20 strokes on each side. Using just bear leather most likely would not have done much to that steel on it's own in a reasonable amount of time. Now I'm new to stropping and it's been a while since I've sharpened manually but the edge I got is able to push cut through paper, open letters like hot butter and cut hair. It is not straight razor sharp, but that could be due to my in experience, perhaps with some more practice I could get there with this spray. I'm now curious to try some of the finer grits here on the site but that will have to be a 'treat' for another time. :) Oh, and if this helps anyone further for the record I sharpened on the Spyderco Sharpmaker, then stropped on the rough side of the leather with some generic green polishing compound, then stropped on the smooth side with the diamond spray. After doing it this way I do not really feel a need to work my way down in diamond grits from say 1micron to .5 to .25. The .25 cut fine on it's own.
25 people found this review helpful
I finally 'treated' myself to a high quality pocket knife, and with that, I thought I would give stropping a go as well. My blade is made of M390 which I have heard would be a hard steel to sharpen. I just put a couple sprays on the smooth side of my strop and it took my edge to the next level. I expect the spray to last me years of sharpening before I need more. It really help cut the steel well, and only needed about 20 strokes on each side. Using just bear leather most likely would not have done much to that steel on it's own in a reasonable amount of time. Now I'm new to stropping and it's been a while since I've sharpened manually but the edge I got is able to push cut through paper, open letters like hot butter and cut hair. It is not straight razor sharp, but that could be due to my in experience, perhaps with some more practice I could get there with this spray. I'm now curious to try some of the finer grits here on the site but that will have to be a 'treat' for another time. :) Oh, and if this helps anyone further for the record I sharpened on the Spyderco Sharpmaker, then stropped on the rough side of the leather with some generic green polishing compound, then stropped on the smooth side with the diamond spray. After doing it this way I do not really feel a need to work my way down in diamond grits from say 1micron to .5 to .25. The .25 cut fine on it's own.
Was this rating helpful to you? - verified customer
25 people found this review helpful
I finally 'treated' myself to a high quality pocket knife, and with that, I thought I would give stropping a go as well. My blade is made of M390 which I have heard would be a hard steel to sharpen. I just put a couple sprays on the smooth side of my strop and it took my edge to the next level. I expect the spray to last me years of sharpening before I need more. It really help cut the steel well, and only needed about 20 strokes on each side. Using just bear leather most likely would not have done much to that steel on it's own in a reasonable amount of time. Now I'm new to stropping and it's been a while since I've sharpened manually but the edge I got is able to push cut through paper, open letters like hot butter and cut hair. It is not straight razor sharp, but that could be due to my in experience, perhaps with some more practice I could get there with this spray. I'm now curious to try some of the finer grits here on the site but that will have to be a 'treat' for another time. :) Oh, and if this helps anyone further for the record I sharpened on the Spyderco Sharpmaker, then stropped on the rough side of the leather with some generic green polishing compound, then stropped on the smooth side with the diamond spray. After doing it this way I do not really feel a need to work my way down in diamond grits from say 1micron to .5 to .25. The .25 cut fine on it's own.
25 people found this review helpful
I finally 'treated' myself to a high quality pocket knife, and with that, I thought I would give stropping a go as well. My blade is made of M390 which I have heard would be a hard steel to sharpen. I just put a couple sprays on the smooth side of my strop and it took my edge to the next level. I expect the spray to last me years of sharpening before I need more. It really help cut the steel well, and only needed about 20 strokes on each side. Using just bear leather most likely would not have done much to that steel on it's own in a reasonable amount of time. Now I'm new to stropping and it's been a while since I've sharpened manually but the edge I got is able to push cut through paper, open letters like hot butter and cut hair. It is not straight razor sharp, but that could be due to my in experience, perhaps with some more practice I could get there with this spray. I'm now curious to try some of the finer grits here on the site but that will have to be a 'treat' for another time. :) Oh, and if this helps anyone further for the record I sharpened on the Spyderco Sharpmaker, then stropped on the rough side of the leather with some generic green polishing compound, then stropped on the smooth side with the diamond spray. After doing it this way I do not really feel a need to work my way down in diamond grits from say 1micron to .5 to .25. The .25 cut fine on it's own.
