I have a stock of 99% IPA already that I use for cleaning the bed of my regular 3D printer, electronics cleaning and for drying things coming out of my ultrasonic cleaner. (I can use salt to drop any water out of IPA, actually.)
With resin 3D printing, my washer uses about a gallon of IPA and it will get super dirty after a while. For that particular case, it's just going to be more efficient to clean the IPA and reuse it until it needs to be distilled. (Wishing the parts in stages will help reduce IPA use, actually. Water washable resin is an option, but I would rather not dump that water down the drain or hassle with hazmat disposal, when applicable.)
Thanks for looking around! I already have a good selection of chemistry glass and am no stranger to doing home experiments. (I could probably use a good vacuum filter anyways and maybe I am just searching for an excuse to get one.) Distillation is an option for me, but it'll be last resort. Still, having a few proper distillation pieces would go nice with my collection....
Some filter rigs I have seen are using small RO systems, but that seems like a pain to clean and those people probably need to filter a ton of IPA for it to be cost effective. Regardless, it is absolutely worth exploring more as setting up a filter loop would be awesome until it gets gummed up.
This looked promising as it is dealing with ethanol and plant extracts: https://youtu.be/VjxZVpGv_aM?si=5VFLYQkObCzUawbb .. (This video specifically got me thinking about what could/couldn't be filtered and is the root of this post.)
And absolutely, a multi-stage rinsing system is going to be needed if I scale up, which may be in the near future. Full context: I am studying and planning for a reverse engineering/prototyping business, so there could be a considerable amount of printing in my future and this is particular problem is part of the cost analysis.
I am very much a DIY'er and doing my own HVAC repairs have never been out of the question. Actually, I have rebuilt a couple of systems, less the pressurized parts of the system....
I started looking into that and if the price is right, it's not that far-fetched. (After all, I did get my ham radio license mainly so I could legally transmit up to 1000W in some cases....)
HVAC repair seems to be a lucrative business so it may be something to do on the side. The certification would be a great way to start that, actually.
Tectonic activity bends rocks all the time, even hard ones like granite. That takes a ton of heat, pressure and time. It also makes sense that in the right conditions, sheets of rock simply don’t have the room to shatter so they must bend....
In these cases the rock may be hot, but it’s not molten. I was even just reading that many rocks will not have any internal stresses from being bent because of the forces and the time that is involved.
It is loosely defined from my perspective, but I am curious about harder rocks, like granite. Your standard everyday rock tends to be much more brittle and may not have a high metal content. (It will likely have iron in one form or another though.)
Most metals and rocks are crystals in their “normal” state, so I see what you are getting at.
Your username is basically the notation for a crystal oscillator, so it’s gotta count. (Damn the rules!) Quartz is a rock that bends for a commercial purpose, so thats a really good answer, actually.
The glass transition temperature of quartz is 1200°C, and according to the charts I could find, is outside crust and upper mantle temperature ranges. (That is just based on averages, I believe. Heat from friction may be in a different category.)
Edit: The melting temperature is ~1700°C. It probably starts to get malleable around 1200°C. I was confused about the term “glass transition” due to some of my hobbies and likely does not apply.
Other silicon-type rocks (like gypsum; opposed to quartz) have wildly different glass transition temperatures in the 200°C range. That seems feasible to bend in a lab and could be in-scope.
Glass is a weird one since it’s an amorphous solid.
Excuse, me though. I might be mixing up my definition of “glass transition”. It’s a term used for plastics (and other amorphous solids) when they start to becomes malleable.
In the above case, I think I tried to apply it to quartz which is incorrect. The temperature ranges are still in the ball park of my intent.
That is actually more of an illusion that is exploiting any bit of natural flexibility over a given length.
If you took a circle of rock that is 30cm in diameter, cut it into a spiral at a width of 5mm, you get a length of rock that is now about 14m, but in a coil.
So, if the material had a flex of 1mm per half meter, you would see a total deviation of about 28mm from end to end. The “illusion” part is that while it’s only flexing a small amount, you can see the entire range of flex at once.
It’s still a spring, but it hasn’t actually been significantly bent or reformed. Also, it’s still really cool.
Yeah, I never thought we could do it at a super large scale since the forces required are too massive. However, I find it funny that we actually do bend rocks, for whatever reason.
The elephant in the room is why? Based on what you described, it seems like a very specific problem that is expensive to solve and happens to be dynamic enough to merit repeated testing.
I am gonna make a wild guess for fun though…
I am guessing the reason it’s done has something to do with mining and trying to solve material density problems. If I needed to drill through a few layers of rock and I knew the material types, sticking samples of those materials in a press that simulates tectonic activity would give me a good idea what I was dealing with. That data seems like it would be key in setting feeds and speeds for expensive drills…
Because, if not, then it means there are no Tucker Carlsons and no Jon Stewarts, and no John Olivers in that universe. Probably because nothing needs internal investigations in that society as a whole!
Yes, thank you. That is exactly what I am looking for. I dunno what I expected, but I was hoping that I was going to avoid a ton of maths. Alas, everything seems to be math. /s
For those who are interested, this led me directly to these:
Ok, I knew those genes were called something! Thinking about homeotic gene mutations has sufficiently jumbled my brain again though. (Hopefully, if I can code a simple analog to represent them, natural evolution can sort out any mess homeosis creates.)
Yes. NSFW tags allow images to get blurred or not listed in a feed by apps. This post is still going to roll across All and not get filtered because it isn’t tagged.
How visible this post is on someone’s phone is variable. It could be a tiny thumbnail, or take up half the screen. While this post isn’t full nude, it is still could easily be considered NSFW.
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I’m in the process of refinishing my basement, and I’ve installed the breakers. My panel uses Square D QO breakers that have a window that shows red when the breaker is in the tripped position. Breakers are then reset by turning fully off and then on....
It is absolutely just more cost effective, safer and better piece of mind to just replace the breaker. I'll take that route 99.99% of the time.
If you feel adventurous, there are a couple of ways to test that breaker without proper test equipment. The risks could be zero OR you blow your face off and burn your house down.
Find an open outlet at tap live to ground. This will produce some natural and organic indoor fireworks, but it should trip the breaker. If it doesn't, there is a small risk of welding the wires together and creating a very strange short condition, turning that entire circuit into a new heat strip. (Free money!)
Find two 1800W space heaters and together, on the same circuit, they should trip the breaker as well. (Breakers should be rated to at least 1800W.) This is problematic as well and I'll explain. There is something magical about space heaters as I have seen 2 or 3 run off of the same circuit before. I suspect that if a breaker is slowly warmed up due to heavy load it will change its characteristics, causing it to only trip at higher loads. (Absolute speculation on my part!) By default, I would replace the breaker if I saw that kind of load. Extended, and higer heat cycles will eventually damage the breaker.
It has been used frequently by Ukrainians describing Russians in recent times. I have to admit, the description is fitting for an invader from the perspective of a Ukrainian.
orc - a member of an imaginary race of humanlike creatures, characterized as ugly, warlike, and malevolent.
First time home owner here. I stuck these vent deflectors a month ago on one of our vents and I removed it today for some other reason. I noticed these stains that looked like water stains but I think it’s actually something that is growing - maybe unfortunately mold or something. I need help in understanding this situation...
It could be a couple of things that I am aware of.
Dust would be the most obvious. Many plastics can hold a static charge and dust can stick to it. The pattern looks “splotchy”, so if not static electricity, it might be oils or some other kind of chemical that is mildly sticky. (Injection molding can sometimes use release agents during manufacturing that are rarely cleaned off. Don’t eat random bits of injection molded plastic, kids.)
Simple moisture could be the issue as well. If you have been using your air conditioning, it’ll get the plastic cold and water can condense on it. Dust or something else might be sticking to it. The water could dry, leaving behind the dust and obfuscating the root cause.
While it could be a mold of some kind, it doesn’t look too much like it. That would point to existing mold in the ducts that is sporulating. Those kinds of house molds are usually dark and nasty, not white. White house molds exist but I suspect it’s region specific as to what kind would grow where you are at. (I grow mushrooms, so I have a supply of petri dishes I would test that substance on, TBH.)
Just for good measure, check your air filters. It’s something you need to do anyway and if they are nasty or old, you could be circulating excess dust in your house and it’s a sign the filters need to be changed. Air filters are functional! Air conditioner heat exchangers can get clogged and, depending on the type of unit you have, be somewhat costly ($500-$1500) to clean properly. I have paid for this procedure twice before I found out that the air filter assembly is garbage in my unit.
Is the substance oily or powdery? If you clean it off, how long does it take to come back? Did someone spill something near that register that you weren’t aware of? Were the carpets recently cleaned?
I am sure that HVAC people may have a more direct answer, but that is my list of things to check.
It’s the splotchy pattern that is bugging me though. It’s highly unlikely that something is getting sprayed out of the air ducts, other than small quantities of water condensation.
If it’s etched, it’s chemical damage. Just from my 3D printing alone, I know that common chemicals (generally acetone or various alcohols) can easily damage and melt some kinds of plastics. So, I agree. I think we found part of the puzzle.
And you are welcome! Thanks for letting me spew out theories.
I didn’t know that. Chloroform always helped my girlfriends melt into my arms, but I never thought about its use on PLA. (Huge /s for people who think I was serious.)
While I was googling around about chloroform smoothing, I also stumbled upon ethyl acetate as a smoother for PLA. It’s probably better for your internet search history to go that route instead. I have a ton of weird shit for my engineering fascinations, but a bottle of chloroform would probably be at the top of that list.
There are many flavors of political views and you can be left, or left-center and still support free markets and capitalism.
Believe it or not, it’s possible for a person to hold right and left ideals simultaneously. As an example, you could say that a person is to the right or left of what you believe and that is much less of a blanket generalization.
DURHAM, NORTH CAROLINA – In late June, I attended a meeting of public works employees in Durham, who were planning the first strike of public works employees in the rapidly gentrifying city, where many city workers can’t afford to live....
Would celite/carbon vacuum filtration perform well enough to remove photopolymers from isopropyl alcohol?
I am simply on a quest to find an effective non-distillation method for purifying isopropyl alcohol used for rinsing resin 3D prints....
Just a reminder to never trust Google Translate ( lemmy.world )
Checking and charging HVAC: Plausible DIY?
I am very much a DIY'er and doing my own HVAC repairs have never been out of the question. Actually, I have rebuilt a couple of systems, less the pressurized parts of the system....
Dairy cattle in Texas and Kansas test positive for bird flu ( apnews.com )
Have we been able to reproduce the conditions to bend rocks? (Even if in a lab.)
Tectonic activity bends rocks all the time, even hard ones like granite. That takes a ton of heat, pressure and time. It also makes sense that in the right conditions, sheets of rock simply don’t have the room to shatter so they must bend....
Robert Picardo Says The Doctor Isn’t Just Comic Relief In ‘Star Trek: Prodigy’ Season 2 ( trekmovie.com )
How do different body parts (specifically shape) emerge from our genes?
I am creating a simulation to evolve simple, multi-cell organisms. (Just for fun!)...
Parametric equalizer on Linux? ( kbin.social )
I use equalizerAPO on windows currently, is there something similar for Linux?
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Janeway’s “Tuvix” Decision Divides ‘Star Trek: Voyager’ Cast: “It Kind Of Hurt Her Character” ( trekmovie.com )
Jonathan Frakes Returning To Direct For ‘Star Trek: Strange New Worlds’ Season 3 ( trekmovie.com )
Breaker normal or faulty? ( i.imgur.com )
I’m in the process of refinishing my basement, and I’ve installed the breakers. My panel uses Square D QO breakers that have a window that shows red when the breaker is in the tripped position. Breakers are then reset by turning fully off and then on....
Jan. 6 Rioter Tackled by Feds While Attempting to Flee Court ( www.rollingstone.com )
Need help understanding my situation about vents and ducts ( lemmy.world )
First time home owner here. I stuck these vent deflectors a month ago on one of our vents and I removed it today for some other reason. I noticed these stains that looked like water stains but I think it’s actually something that is growing - maybe unfortunately mold or something. I need help in understanding this situation...
Why it's impossible for right-wing governments to handle a crisis ( www.msn.com )
xkcd #2839: Language Acquisition ( xkcd.com )
Alt text: My first words were ‘These were my first words; what were yours?’
Georgia Republicans suspend state senator who wants to impeach DA for indicting Trump ( news.yahoo.com )
Durham Public Works Employees “Illegally” Strike for 1st Time ( paydayreport.com )
DURHAM, NORTH CAROLINA – In late June, I attended a meeting of public works employees in Durham, who were planning the first strike of public works employees in the rapidly gentrifying city, where many city workers can’t afford to live....
Syrian protests enter second week with calls for Assad to go ( www.theguardian.com )
Demonstrations have grown steadily throughout the south, centring around the province of Suwayda...
Second US tropical storm in a week drenches Texas ( www.bbc.com )