16-02-2015, 04:57 PM
(This post was last modified: 16-02-2015, 05:09 PM by Alan Douglas.)
OK, that's a fraction of petroleum too, the heavier part than petrol/gasoline, which grades up through diesel/kerosene, and oils. Should be the ideal solvent for tar (presuming that's what it is).
"Pitch" to me means something that drips from pine trees, but the term gets used for petroleum products here too.
This stuff that Philips used could contain residual acids from the refining process and I suppose could attack copper through any cracks in the wire enamel. You might get lucky and find the breaks are all at the surface.
"Pitch" to me means something that drips from pine trees, but the term gets used for petroleum products here too.
This stuff that Philips used could contain residual acids from the refining process and I suppose could attack copper through any cracks in the wire enamel. You might get lucky and find the breaks are all at the surface.
