How to Label Tubes?

[dankinzelman]

Hi, I want to label a group of (output) tubes for sorting. I've tried masking tape but it singes and the adhesive sticks to the tube when I pull the tape off, then I have to clean it off with WD-40 and I'm afraid of damaging the factory label on the tube. Any suggestions for labels or tapes that can handle the heat and are easy to apply/remove?

[shooter]

I used an empty egg crate and a black sharpie, while "under test".  then transferred them with data collected to tube boxes I had/bought, walla...Dave's tube's with datasheets 

[dankinzelman]

Thanks shooter, so you write directly on the glass with the sharpie? Then how do you remove the writing?

[shooter]

nope, notes on a card
Ik
VP
Vgain
Notes:
wrap the note card around tube, insert into tube box

[kagliostro]

Black indeleble marker

Franco

[Merlin]

I use a Merisen white marker to write on tubes. I don't actually know how well it holds up to really long term heat, but it works for my needs.