Then have at it, the silicone should easily be removed with harsh chemicals without harming the substrata. Less harsh try Vinegar and isopropyl alcohol with good long soaks.
Inspired by this discussion about chemicals and dedoming I did few tests. I put WD40 and brakecleaner in small container. Those small plastic cases that Simon uses when he sends emitters.
I put sliced Xhp70.2âs in both of them. WD40 hardly did anything in 24 hours but brake cleaner did this in 10 hours:
Seems promising. Letâs keep experimenting. (Grey stuff is just leftover thermal paste)
After testing the emitter works fine. Sadly this one has had some strange behaviour before, and after this harsh bath it hasnât improved. 1 of 4 diodes is cooler colored than the others and it also has afterglow for a few seconds. Itâs like 5000-6000K and others are 4000K as they are supposed to be. It also lits up in lower voltages than other 3.
On the subject of aromatic solvents, does anyone know of an epoxy (the cured hard type) solvent?
Have a very small amount to remove from a watch mechanism. Canât scrape this off and immersion of the whole spring/ escapement is not an option. But I could wrap it in some gauze and light plastic film to let it do its thing.
Tried Methyl Ethyl Ketone (MEK), Acetone (diMethyl Ketone), Methylene Chloride (Acrylic solvent / one of the ingredients of paint stripper).
Google search â bad results; easy to remove uncured resin. Nothing really tested about cured stuff. I mean, isopropyl, methyl or ethyl alcohol, paint thinner (usually kerosene), lacquer thinner (which is mostly MEK but some variants having more volatiles), and citrus-based cleaners as GooGone just makes an oily mess. No success on some test pieces.
Hadnât tried gasoline â smelly, although very active solvent.
Methylene chloride for Epoxy. 5% sulfuric acid or sodium hydroxide for polyester resin. Dichloromethane warmed to 40C for a few hours. Methyl Ethyl Ketone (MEK) I used for removing cured epoxy on pcbâs. Itâs the same chemical your Kidneyâs release that make that awful morning piss smell.
I tried Methylene Chloride but was disappointed. In no way dissolved the Epoxy.
H2SO4 or NaOH canât use on precision watch parts - substrate of aluminium and/or brass.
MEK has no effect on my test pieces.
Dichloromethane is Methylene Chloride. This boils at 39.6ÂșC.
Now if you soften the cured epoxy with these products and then scrap them off, perhaps. But Iâm looking for a solvent.
So maybe the solvents arenât what is written on their containers or my chemistry is wrong. The Methylene Chloride is clearly labelled as such, IIRC. Used for acrylic fusion from a plastic modelling company. The MEK is a principal ingredient in lacquer thinner (from the can label as MSDS â commercial packaging).
I always thought Uric acid was the nasty morning pee smell.
Simply swap led in Trustfire T4, days ago. Put cslnm1.tg in it but the result is worse than I expected. Seems like the reflector is not suit for this led, the beam lost too much light to corona around hotspot.
I tried to upload pics on Imgure all day but still canât until now. I will post it later if Imgure let me upload them.
I might try to change led again later to a more floody higher lumen led .
Youâre right it does boil at 39.6 Itâs been awhile since Iâve used it. However I did use it in a glass jar with a loose lid swirling it while in warm water. It kept the smell down. Fume hood only goes so far.
Google says excessive uric acid has an ammonia smell, myself I donât remember. Eat too much fat the night before and youâll get a little more MEK out in the morning. All the stuff I used Iâm surprised I donât have cancer. You harsh chemical users; Fume hood or outdoors not garage style but really outside. Gloves, splash guard, cotton clothes.
But I still donât understand why my methylene chloride doesnât dissolve the hardened epoxy. Itâs one of the active ingredients in paint stripper (along with sodium/potassium hydroxide â the gel types). And the smell is ethereal - almost sweet.
Iâll be trying gasoline. Itâs loaded with petroleum esters and although has a lingering smell, is about my last resort.
There would be some âLepageâs glue removerâ which I doubt is sold in the US. But typically these over-the-shelf concoctions are a random mix of many VOCs (volatile organic compounds) and leave many residues.