Pencil eraser on protoboard test results

[kalel]

Some have mentioned using pencil erasers for cleaning various contacts as method that doesn't do much damage, so I wanted to test it on something, I took a cheap protoboard to do the test.

It seems to really clean things well, but in this case it will also fill the holes so it might not be a great method for this use.

I'm sure you can notice which area is cleaned (some partially which is good for comparison):


I assume the cleaned areas would take solder much better than the other.

Why the remaining parts of the rubber eraser are black, I'm not sure.

[TerraHertz]

Why the remaining parts of the rubber eraser are black, I'm not sure.

Fine metallic particles tend to look black. Same effect can be seen when polishing metal with Brasso and a cloth, or any polishing paste and cloth buffing wheels. The cloth becomes very black.

[vk6zgo]

Keep a few toothpicks on hand to clean the rubber particles out.
If you have an air compressor, just blow them out.