Sandpaper [ Emery Paper ] - Grit Size Question

[Amarbir[CDR-Labs]]

Hello ,
I Am Having a Tough Time Arranging Preferred Grit Size Paper For Removing Coating On Monoliths .Could You Please Send Me Some Of Your Preferred Numbers .Really Appreciate That So That i Can Retry Again Tomorrow

[ddrecovery]

Hello ,
I Am Having a Tough Time Arranging Preferred Grit Size Paper For Removing Coating On Monoliths .Could You Please Send Me Some Of Your Preferred Numbers .Really Appreciate That So That i Can Retry Again Tomorrow

I completed the Ace Labs Flash training class a little while ago, and they were recommending 1200, then 2000, then 2500 grit. I have found this is supplied by a lot of jewelry suppliers.

[Amarbir[CDR-Labs]]

Hello ,
I Am Having a Tough Time Arranging Preferred Grit Size Paper For Removing Coating On Monoliths .Could You Please Send Me Some Of Your Preferred Numbers .Really Appreciate That So That i Can Retry Again Tomorrow

I completed the Ace Labs Flash training class a little while ago, and they were recommending 1200, then 2000, then 2500 grit. I have found this is supplied by a lot of jewelry suppliers.

Hi Boss ,
I Only Found 1000 and 2000 today will ask them for 1200 and 2500 also tomorrow

[HaQue]

I use just 1200. but what about the fibreglass scratch pen? you are only removing the coating..

[jeremyb]

Use a high pressure water jet, you can dial in the specific pressure you want, other solutions are a dremel on a CNC machine. Some use 100-300 grit sandpaper, but I don't recommend.. you have many options. CNC + Dremel is the best IMHO at ~$250-$300. You can also experiment with different varnish removers, see which ones work in your locality.

I use just 1200. but what about the fibreglass scratch pen? you are only removing the coating..

Fiberglass anything scares me

I completed the Ace Labs Flash training class a little while ago, and they were recommending 1200, then 2000, then 2500 grit. I have found this is supplied by a lot of jewelry suppliers.

I'll mail you a monolithic, compare it to ace and tell me what you think
One of the many reasons I laugh when Ace Labs says they are skilled in monolithics..

[HaQue]

Really, you just need to get down to the copper and have it clean enough to solder to. you don't even need to clean the whole thing off.

wet and dry sandpaper is what is used to prepare cars for re-spraying. available at any hardware or auto parts shop

[jeremyb]

Really, you just need to get down to the copper and have it clean enough to solder to. you don't even need to clean the whole thing off.

You don't recommend removing the PCB and soldering directly to the wire bonds? It's less trouble than figuring out pin-outs..

[HaQue]

I think I know what you mean, and this is the general idea for that: https://www.youtube.com/watch?v=dQw4w9WgXcQ

[jeremyb]

I think I know what you mean, and this is the general idea for that: https://www.youtube.com/watch?v=dQw4w9WgXcQ

That was the basic idea..

How about Sand blasting?
http://components.about.com/od/Design/a ... r-Mask.htm

[HaQue]

I think I know what you mean, and this is the general idea for that: https://www.youtube.com/watch?v=dQw4w9WgXcQ

That was the basic idea..

How about Sand blasting?
http://components.about.com/od/Design/a ... r-Mask.htm

The downside to microblastic systems is the generation of static electricity which can destroy ESD sensitive components on the circuit board

[Amarbir[CDR-Labs]]

Hi Everyone ,
Thanks For Some Inputs By All Of You .

[digisupport]

+1 for fiberglass pen - always works great

[data-medics]

This does look like it would work well: https://www.youtube.com/watch?v=nKjvrDCktpw

I don't do monoliths, but it seems to clean up a pcb pretty easily.

[jermy]

@data-medics this is a fiberglass pen

[HaQue]

And the video is by Joe grand - he does some cool stuff like making the defcon badges, and JTAGulator.