After my experiment with Silvo last week, I wanted to take things a little bit further
I now have a board with a matrix for testing. I found some Mother's California Gold Metal Polish in a tool cabinet here, so figured I'd add that in too.
Its more like Brasso than Silvo in that its liquid is Kerosene, however it uses alumina rather than silicates for it's polishing agent. Silvo is Silicates and porcelain clay is isopropyl alcohol. The Mother's polish also has several oily agents within it to help make things look a little shinier and i'm guessing to try to stop it from tarnishing in a hurry.
The test print has 4 columns:
* None - No polishing of any kind will be done on it.
* VPAD - just polished with the Voltera supplied pad - all of the samples other than none get an initial treatment with the Voltera pad.
* Scotch - Going the other direction to fine polish, a scotch pad which we'd normally use for deburring is used to scuff up the surface. I think this will do terribly!
* Silvo - Polished with silvo
* Moth. - Polished with Mothers California Gold Metal Polish
* Cloth - residue removed with just a cloth/paper towel
* ISO - residue removed with isopropyl alcohol
* Ace. - residue removed with acetone.
Each segment in the grid has an 0603 and a 1206 pad, as well as two pads for solder testing - one pad will have paste deposited, the other will be manually soldered.
The silvo is being used by a co-worker so I won't be able to use that until tomorrow.
Solderability_Paste_Top.gbr (2.4 KB)
Solderability_Copper_Signal_Top.gbr (151.6 KB)