We want aluminum, not diamond, correct?
Looking around at the 3M six pack at stewmac.com it seems this 6 piece set includes a 30 micron/ 400 grit and 15 micron/ 600 grit. These are a little too much, no? The highest grit it has is 1 micron/ 8k. Where then to get the .3?
Last edited by rickboone1; 04-06-2012 at 05:48 AM.
Stoo word of The Great Outdoors
Or, since you're ordering from Thorlabs anyhow, you could get their glass plate:
I prefer the granite, just because it's massive and awesome (comes with certificate of flatness, comes in a mini crate, etc)
OK, some 0.3µ just landed in my mailbox.
I'll see what it can do following the 15K Shapton Pro.
As for backing, I have only limited experience w/ lapping films, but glass is an awesome background, since float glass is probably one of the dead-on most perfected even level surfaces created by man.
I have used the back of a Shapton glass stone before & that works swell.
Can-can scratch patterns!
And don't forget the sheet of wet paper under the film for your final finisher!
I've been using a piece of 24" X 3" tempered float glass from a med. cab.where I can line up my 1 and my 5 at the same time. I also just snagged a 25 pack ( 6X9 ) of both 5 and 1 micron for $11.25 a pack. Seemed reasonable enough at .50 a sheet,, and I get two out of each.
Just playing with numbers here. A 25 pack, cut into 3 X 9 strips, used only 5 times, will do at least 250 razors. Not bad for $11.25. Or $22.50 for two grits.
Using the $300 number for one stone and getting the 2 films instead would do nearly 3400 razors. To me, that's a lot of MOJO.
Match them up with the 4 cotton belts I just picked up for $5.00 with pastes and I'm good to go. Not counting the paste you decide on,, you can be into it for nearly what? $30.00 bucks?
Now I can buy more razors!
Last edited by mycarver; 04-06-2012 at 07:54 AM.
Hydro-magic Injector, assorted straights
Commodore X3 2-band, Vintage AS2M, Thater 4125/1, 2010 B&B Custom Boar, #33 B&B Limited Edition RV, Wee Scott
Pilot Vanishing Point, Waterman Expert II, Esterbrook J in Blue and Orange, Sheaffer's Admiral Snorkel, TWSBI ROC 100
I saw in the Synthetic Progression thread that you go right from a DMT1200 to 3um film. Would I be ok with a 1000 King and the 3um? Or would it be better to spend a couple extra bucks for a DMT? I don't plan on doing any really heavy restores yet, so I think the 600 would be a little overkill for me.
The Thorlabs sheets are 13"x9" @ $13.40 a 10 pack. You cut each sheet up into 4 parts 3.25" x 9", so you have 40 3.25"x9" sheets at 33.5 cents each.
If we go with you extremely conservative number of 5 razors per sheet (the real number is probably north of 15, but let's not be hasty here...), you get 6.7 cents per razor.
Again, with your estimate of a $300, hewn from the belly of Mount Fuji JNat, or an unearthed from beneath the bowels of Belgium Coticle, you would have to hone 4,477 razors ($300 divided by 6.7cents per razor) on that $300 to get the same cost per honing as you get on films.
I'm not sure if even ProfessorChaos has that many razors!
And if you use the real-world usage on films of 10 razors per film...forgeddaboudit! You'll be dead and long gone before you'll be able to hone enough razors to match the per honing pricepoint of films.
Sure, the films may lack soul. But if you get a precision granite plate, you get to have some of that NatRock beauty all yourself too!Here's mine, dry and wet. Notice the fine gaijingowari patterning (I swear, half the reason why guys love JNats is all the lingo that comes with it...)
But maybe...The films cut so aggressively that you probably could go right from the 1000 to the 3um film, you just may have to do a few more laps.
I'm not a fan of the 5um Alox film, as the grit is not very well bonded to the sheet, and it creates its' own kind of slurry. If that's your thing, then great, but from what I've seen under the scope it leaves things rather messy. I love the 3um and 1um. The 0.3um I again do not like. I prefer finishing on a pasted strop to what I get off the 0.3um films.
Last edited by Seraphim; 04-06-2012 at 08:22 AM.