Theo wrote:
I ordered some white PVC flex to replace a pendant lampholder.
Unfortunately when it came it turned out to have conspicuous 'dot matrix'
style black printing along the length. This makes it unsightly for
something that's going to be on display, and there's no part without
printing long enough for what I need.

I tried rubbiing the ink with water and then IPA, to no avail. I could
sand it, but the rough surface would then be a dust magnet.

Any ideas what kind of solvent might clean it off?

Thanks
Theo

"The basic make-up of UV-curable inks consists of four components:

monomers, oligomers, pigments, and photoinitiators.

The monomers provide a building block of the ink, and can contribute
certain properties such as softness/hardness of the ink when cured.
Monomers also help control ink viscosity, which is essential to
jetting reliability.

The oligomers in the ink formulation consist of reactive resins and
uniquely formulated adhesive components for printing on a wide range
of different substrates.

The pigments provide the color.

When the photoinitiators are exposed to UV light, the oligomers and monomers
cross-link or polymerize. So unlike aqueous or water-based inks, no heat
or air drying is required for curing. But even the photoinitiators need
to be tuned to a specific wavelength of UV light.
"

Just a guess. That's the Timex of inks - shockproof and waterproof.

I have a cable sample here, of a different kind of cable than the OP,
but the inkjet print style is the same. And that ink is just as robust as the
cable insulation, and it's not going anywhere.

If you find a solvent for the ink,
the cable insulation will likely dissolve too.

Paul