What mesh size would these specs be?

Looks like you got a bunch of different sizes there. The only way to know for sure is with an optical measuring tool from a place called nanometrics, at many thousands of dollars, or a set of scientific screens, and those are around $90 each and up and you would need a stack. a good mining supplier should have 80 and 100 mesh on the shelf for a lot lower, but the truth is Teds right on this 110%. Get the coffee filter.

http://www.goldprospectorsspace.com/photo/weekend?context=user

If you look at this pic, the visible pieces can easily be manipulated with a soft sable paint brush. but the color on the pan is dust so fine it can only be swept up with a stiff nylon bristle brush. You can collect it that small, but your better off digging more lol. I figure once i collect the material I might as well get everything it has within reason for the time spent.

Its likely everywhere your digging will have about that same volume scattered all through the material. You want to move up and down the river during the rains. There will be choke points where the average small rain will raise and lower the water level very fast within hours. Not big rains but the small regular ones. You will find bands along the banks both above and below those small rain choke points with much more volume of that small stuff. Then you also want to look at the big rain overflows where the water comes up above those choke points and goes around. Just below where it goes around you will find richer sands as well. Its very hard to explain in words, and simple to show in person.

http://www.goldprospectorsspace.com/photo/mossing-dust?context=user

When you run these cons your going to lose that micro unless you run very low pressure and very low volume, with a very slow feed in your concentrator. You can see about 5 inches of fine gold and then it goes to black sand in this pic. There is just enough soap in the water to not bubble up in the concentrator bucket. The speed its running at is about every 5 seconds i can count 1234 or 123 particles of black sand hopping the mat riffles. Its moving but very slowly. That's when you catch all the fines. I was never able to do this till recently when i got the A-19. It doesnt work with square ribbed mat very well at all. just the textured rounded rib. Its the exact same principle as tiny as you can go as is the bigger highbankers and wash plants. just focused to tiny size is all. It may take several start and stops to get that flow. Easiest with a set of two ball valves in line. Still takes a lot of fiddling.

Replies

Au Hunter November 20, 2012 at 3:51pm

Maybe a 30 mesh size.
Flour (Indy Jones) Mike November 20, 2012 at 1:05pm

Looks like you got a bunch of different sizes there. The only way to know for sure is with an optical measuring tool from a place called nanometrics, at many thousands of dollars, or a set of scientific screens, and those are around $90 each and up and you would need a stack. a good mining supplier should have 80 and 100 mesh on the shelf for a lot lower, but the truth is Teds right on this 110%. Get the coffee filter.

http://www.goldprospectorsspace.com/photo/weekend?context=user

If you look at this pic, the visible pieces can easily be manipulated with a soft sable paint brush. but the color on the pan is dust so fine it can only be swept up with a stiff nylon bristle brush. You can collect it that small, but your better off digging more lol. I figure once i collect the material I might as well get everything it has within reason for the time spent.

Its likely everywhere your digging will have about that same volume scattered all through the material. You want to move up and down the river during the rains. There will be choke points where the average small rain will raise and lower the water level very fast within hours. Not big rains but the small regular ones. You will find bands along the banks both above and below those small rain choke points with much more volume of that small stuff. Then you also want to look at the big rain overflows where the water comes up above those choke points and goes around. Just below where it goes around you will find richer sands as well. Its very hard to explain in words, and simple to show in person.

http://www.goldprospectorsspace.com/photo/mossing-dust?context=user

When you run these cons your going to lose that micro unless you run very low pressure and very low volume, with a very slow feed in your concentrator. You can see about 5 inches of fine gold and then it goes to black sand in this pic. There is just enough soap in the water to not bubble up in the concentrator bucket. The speed its running at is about every 5 seconds i can count 1234 or 123 particles of black sand hopping the mat riffles. Its moving but very slowly. That's when you catch all the fines. I was never able to do this till recently when i got the A-19. It doesnt work with square ribbed mat very well at all. just the textured rounded rib. Its the exact same principle as tiny as you can go as is the bigger highbankers and wash plants. just focused to tiny size is all. It may take several start and stops to get that flow. Easiest with a set of two ball valves in line. Still takes a lot of fiddling.
- Maurice Austin AKA2centsgoldless > Flour (Indy Jones) Mike November 20, 2012 at 2:19pm
  
  Very nice reply Mike. I appreciate you taking the time to explain these questions as I always learn from them. Thank you!
mtau November 20, 2012 at 11:30am

I'ld say in the 80-100 mesh range. Get a metal coffee filter. They are 80mesh.

This reply was deleted.