Richmond Diamond Spray is a polycrystalline diamond suspension in a 2oz spray bottle designed for use on leather and fabric strops. Each bottle contains 10 carats of diamond powder in a non-clumping formula. Spray 2-3 times on the strop surface, let it dry, and strop as normal. The diamond compound loads into the strop and lasts through multiple stropping sessions - a little goes a long way. The spray is used in the CKTG sharpening service for final edge refinement before knives are returned to customers. Micron size determines the level of refinement: larger micron = more aggressive, smaller micron = finer polish.
The 0.25-micron spray is the second finest in the Richmond range - a high-refinement compound for sharpeners who want a polished, near-mirror edge. After a 5K-8K stone session the 0.25-micron strop removes the final fine burr and refines the edge surface to a level that performs noticeably better on fine slicing work, raw fish, and precision vegetable cuts where a polished edge makes a clear difference. It is also used in the CKTG sharpening service for final finishing before knives are returned to customers. For straight razor users the 0.25 micron is a common pre-final-strop compound before moving to a plain leather finish.
What Customers Are Saying: Nine reviewers confirm strong performance as a fine refinement compound. Described as noticeably effective for producing polished edges that perform well on fine cutting tasks.
Care Instructions: Store upright. Shake before use. Keep away from heat. A single application lasts multiple sessions - do not over-apply.
The 0.25-micron spray is the second finest in the Richmond range - a high-refinement compound for sharpeners who want a polished, near-mirror edge. After a 5K-8K stone session the 0.25-micron strop removes the final fine burr and refines the edge surface to a level that performs noticeably better on fine slicing work, raw fish, and precision vegetable cuts where a polished edge makes a clear difference. It is also used in the CKTG sharpening service for final finishing before knives are returned to customers. For straight razor users the 0.25 micron is a common pre-final-strop compound before moving to a plain leather finish.
What Customers Are Saying: Nine reviewers confirm strong performance as a fine refinement compound. Described as noticeably effective for producing polished edges that perform well on fine cutting tasks.
Care Instructions: Store upright. Shake before use. Keep away from heat. A single application lasts multiple sessions - do not over-apply.
- Brand: Richmond
- Micron Size: 0.25 micron
- Size: 2oz spray bottle
- Diamond Content: 10 carats polycrystalline
- Use: Apply to strop 2-3 times, let dry
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.
