Oooh - KB, you beat me to it, but that was a help . I got an unused can of MEK sit'n around. Keep us posted - it's expensive though but interested to see if it works.
Your picture of the nitro thinner dedomed SST-40 next to the toluene dedomed SST-40 shows exactly why we should use toluene.
The greenish tint is all to familiar to chemical dedomers, we all want the other result (right one in the picture).
Also, the fact that a tough dome like SST-40 is gone after a short while, and without heating the solvent, is another reason to get pure toluene.
Yeah, that is weird. But as far as I know everyone else who uses nitro thinner gets the green tint shift. Do you boil the liquid? Does yours contain acetone?
What do you mean by tint shift is nearly invisible? Does it still turn slightly green?
Wish you show us and explain your procedure little better. Can you Show result of your hot/cold nitro de doming vs toulene ( photo of both de domed emitters).
It seems that you discover something new and good and community will be grateful if you reveal your method. If you can show us photo of your method. I really looking forward to it.
IME when you take the dome to the bare phosphor no matter which method tint shift will happen…
I had similar results with hot dedome(2 methods of this hot de doming, there are 90% chance of leaving silicone residue on emitter after that methods and yes that will lead to less tint shift(tint shift still happens) cause there are still some silicone remains sticked to emitter phosphor surface). Solvent methods take all that silicone to the bare phosphor and they maybe even recycle micro particles of phoshor so yes there is probably a chance for even greater tint shift.
So your toulene method takes all the silicone to the bare phosphor but tint shift almost did not happened? Hmm… Well It could be…
My guess that toulene leaves some silicone residues on phosphor. Or how to say it can’t dissolve the part of the silicone that is merged with emitter phosphor surface. And if that happens it is good… Real good… Can you please show us results with photo?
I’m about to do that, just haven’t had the time to do it today… But I don’t have a specific procedure yet as I’ve only done it once with toluene. It could just be a fluke, even though I don’t think so.
And as you said, if it leaves a tiny bit of the silicone over the phosphorus I don’t mind. I happily sacrifice a bit of throw for a tint without green.