A Perfect Dedome?

Yes, the glue that held the phosphorus completely dissolved in high temperature Toluene. I don’t think you have to mix it. Even though the dome popped of in about five minutes in cold Toluene I had to leave it in for over 15 minutes to get it completely clean. So I’m not worried about that.

Toulene is the nastiest chemical I use regularly. Cancer in a can. It soaks through your skin. The vapors also have made me very ill. There’s good reason it is hard to find in stores. It is the best at dissolving silicone, though. Gloves and respirator are a must. It might even soak through nitrile and latex.

I hear ya! I use gloves and a gas mask when using it!

Okay, thanks for the warnings.

:exclamation: Don’t touch it, don’t breathe it, don’t heat it. :exclamation:

I think Tom E ordered Zep Aerosolve 2 from eBay to dedoom with.
Just be careful with that, it’s Trichloroethylene.

WARNING: This product contains a chemical or chemicals known to the state
of California to cause cancer, birth defects or other reproductive harm.:
Trichloroethylene

I think here in EU it’s no longer available because it’s cancerous.

Found a PDF that say that silicone fluids (related to the doom silicone?) are soluble in chlorinated hydrocarbons (as Trichloroethylene is)

The PDF:

The least dangerous of them (on the left side on the picture) should be ethyl acetate.
It’s used in a disinfectant for small cuts here in Sweden.

Anyone tried ethyl acetate to dedoom a LED?

Don’t even look at it.

Pretty much. :disappointed:

I was using it outside on a very hot day in the sun, inhaled too much I guess, or pehaps it penetrated my gloves. Instant flu-like symptoms, dizziness, all of the above.

Like I said though, it makes even the toughest silicone wash away like water. Ace hardware stores in the United States carry it, I think.

Oh now I’m really scared, why did I even buy this stuff? :person_facepalming:

Like boiling MEK wasn’t bad enough!! :disappointed:

Well I got the 15 SST-40’s today, maybe should order one of them Life Alerts just in case….

Going in…… :cry:

Good luck! Don’t forget to wear butyl gloves and gasmask.

Read somewhere that nitrile gloves is not good with withstanding toluene and in some racing/car forum they mix this with the gasoline to raise the octane value but someone warned not to use over 20℅ toluene in the mix otherwise it starts to dissolve the nitrile fuel lines.

Remind me never to eat pot roast at your house.

I run VP C114+ Race fuel in my Drag Bikes and that’s exactly what this stuff smells like!

Well 2 hours on warm in the crock pot, domes are swelled up, but not off, let it sit over night, got up at 3:00 a.m. Targets remain….will check after work…

No worries, the slower the better! The boiling Imron Thinner blew the domes off 5 XHP70 emitters and the phosphorus with them, the 70.2 came off in like 5-10 minutes in the stuff, but the beam was crap, the phosphorus is like really chunky, the only ones that it worked on was the XHP35 HD’s I de-domed. But I ran them in lights first, the other were brand new never lit up!!

So I think slower is better….

How long is slow :stuck_out_tongue:

Jeez not slow enough! So after 2 days cycling between warm (the lowest setting on the crock pot) and cold, letting it sit over night, gone thru 9oz. of Toluene… it’s not good! :person_facepalming:

The domes on 2 must have been hanging by the bond wires and took them out with just blowing on them and the first one hit with a light blast of air took the phosphorus as a complete pad with it? :rage:

The XML’s XP-G2’s no problem.

Had them sitting up, as not to pull phosphorus off hanging them upside down, like what happened with the XHP70’s?

I’ll give it another go, hanging them upside down and see? IF this don’t work, I’ll just go back to agitation and cold fluid de-doming……takes forever but it works for me with the XHP35’s and XHP70’s.

For SST-40 I am giving up on liquid method and switching to shawing, just have to buy some razor blades.

Well the liquid de-doming isn’t the problem, that I’m finding out with the tougher LED’s, it’s the time, nothing good comes fast I guess. :smiley:

And too Hot seems to just explode the domes up off these tough LED’s and takes phosphor with it, as I witnessed doing the Hot and I mean bubbling HOT de-doming (MEK :confounded: ) the XHP LED’s. :cry:

I’m going to reflow 3 more SST’s and hang them and just go slow, till they fall off? Then see what’s UP? :person_facepalming:

Normally I just use one of them Jewelry Sonic cleaner’s and IMRON paint thinner but it could take a week or two, because I only run it when I’m going to be around to monitor it, other wise it just sits in the fluid.

Let’s call it heated chemicals method, works fine for me when I dedome XML2, XPL or XPE2 leds, usually I hang then upside down submerged in liquid heated to about 45-50 degrees celsius. It takes about 40-60 minutes and as soon as I notice that the dome has lifted from the phosphorus surface I take them out, remove the dome, wash the led with 96% alcohol then remove remaining silicone around the phosphorus “core”, wash again with alcohol then with destilled water, dry it out with compressed air and that is it, for XPL its even faster because silicone dome doesnt go around the led like on XML2 or XPG2… leds.
This method gives me minimum tint shift, I would say that 6500K only drops to 6000-5800K (but I have no way to measure this so, it’s my subjective opinion).

Where can i buy sst-40 hi ?
Thanks

for better beam focus, better throw.

I am sory, that’s confidential, you have to have at least 1000 posts for that info. :smiley: