retrofreak83
Active member
Hello all,
I recently had some small solder work on a SE/30's analog board.
I used (no-clean) flux. Afterwards, I noticed some greyish/white residue/shimmer on the board. I cleaned the spot I've been working on using isopropyl alcohol. I got the impression that like the more I used it (on the greater area), the more shimmer came up.
After all, the areas that I have used isopropyl alcohol on seem to be cleaner (see image with "cleaned area" text) and also feel smooth:
There are also areas which not been touched by me so far but look dull. It also feels dull.
So what I'm asking myself is:
Were these boards equipped with some kind of protective paint?
Is there anything that needs to be done here? In particular, I can't get the solder joint any cleaner than it is.
I recently had some small solder work on a SE/30's analog board.
I used (no-clean) flux. Afterwards, I noticed some greyish/white residue/shimmer on the board. I cleaned the spot I've been working on using isopropyl alcohol. I got the impression that like the more I used it (on the greater area), the more shimmer came up.
After all, the areas that I have used isopropyl alcohol on seem to be cleaner (see image with "cleaned area" text) and also feel smooth:
There are also areas which not been touched by me so far but look dull. It also feels dull.
So what I'm asking myself is:
Were these boards equipped with some kind of protective paint?
Is there anything that needs to be done here? In particular, I can't get the solder joint any cleaner than it is.