[GrimJosef]

Yes, they are modern capacitors. The ones I wanted to cover were made by Vishay Sprague who print the lettering onto the capacitor can and then wrap it in a very thin, very durable and very, very adhesive colourless transparent film (think Sellotape only stronger and stickier). So I don't have to do any labelling with these. I just slip the blue-dyed heatshrink over and shrink it.

I have, in the past, stripped the outer opaque film off other modern capacitors and then labelled them using water-slide transfers before re-covering them in colourless heatshrink. This can work quite well but now the faff comes in producing a convincing label and in positioning it around any grooves in the capacitor can. Grooves half-way along the can are sometimes present these days unlike in times past.

Cheers,

GJ