"Permanent Markers" that don't fade

[rodrigo]

I've tried about 3 types of different brand "permanent" markers to write on my plant labels. Mostly the ones used for labeling CD's, etc.

But they all seem to fade with the sun after 2-3 months

It's real upsetting, since I spend hours cataloging my different Hybrids, etc. and now some of my labels are so faded that it's impossible to read what I had written.

Has anybody else had this problem?

Could somebody recommend a "Permanent Marker" brand that does not fade with the sun?

Thanks,

Rodrigo