Making color changing plastic 

"In the seventh step NileRed tested the Ph, and saw that it was strongly basic, and it was good." - Synthesis 6.28.

This guy is just a badass. I mean, how often can you say "that's way too expensive, nevermind, I'll do it myself" Props to you!

I came here to see a cool color changing bear, ended up getting a degree in chemistry.

"I will update you guys when the color changes." 2 years later: Bear: Nope i just like to stay yellow

I need a “but anyway” shirt in the merch store.

I love that every one of your videos are ‘I’m gonna try this’. ‘I fucked up’. ‘It’s not really a big deal’. That’s literally how I live my life lolol

Went on my first university lab experience the other day. I was one of the only ones who knew how to use the fancy equipment and why we were doing things, purely because of your videos. thanks mate

Bro... Sell your own DNBP for half price, and you're still $81.26 in profit per 50 mg. That is an insane price lol.

Am I the only one who doesn't understand much of this but still enjoy it?

Brain: Eat the bear Me: wtf no it'll kill me Bear: You must!

I was having a bad day, then he made Science Bears and it instantly improved.

Is it possible that the bear's reverse behavior wasn't brought directly by UV light but rather heat? You demonstrated that heat can reverse the bluing. A lot of plastic-y things absorb UV light and produce heat. Plus, that dark blue color probably doesn't allow light-triggered phenomena to propagate very quickly. So I'd wager that's what's happening here: the bear just got hot.

Instead of making bear with epoxyresine added with photo chromic dye, make bear with nornal resin and coat it with epoxy resin added with photochromic dye. Outer coat of it give fast response to light changes. Thanks

I can‘t get over the fact that sigma would have sold your 2 gramms for way over 6500$

I have no idea, but what makes me happy is how clean his table is.

In photography there is a substance called "Liquid Light", which is silver nitrate(?, whatever the chemical is in photo paper) mixed with gelatine and melted with heat. When you spread the molten gelatine on, it is thicker and so you can spread it more evenly. Maybe this would help the quality of the spread. Ideally you want a uniform layer of the chemical, and a thicker compound would likely make this easier. You could also mix it into some glue, although you might get bubbles which are a big no-no for this.

If you add it to an epoxy that has already started to set up, you should get a suspension of crystals.

Next time you try the photo exposure trick, put something opaque (and preferably matte black) under the paper. Your bad exposures were likely caused by light getting under and through the paper and reflecting through and off of the back glass.

When I was doing Chem in HS, I never got what they wanted me to do when “observing” my procedure and write it down, thanks to you know I know EXACTLY what they mean 😂 thanks for helping my grades

6:17 And the lord said "let the magnesium be pulled from the aether"

I really like your videos, they are high quality and great content about chemistry.

Nice video. Safety note - Generally, it's not a good idea to evaporate diethyl ether on a hot plate as you can reach its auto ignition point and you will get a flash explosion. That's why the proper way to evaporate ether is using a steam bath. The boiling point of water is below the auto ignition temp of diethyl ether. Stay safe and keep the videos coming :)

"Dissolved Into The Ether" is our new song

Nice to see chemistry videos! l _hated_ chemistry in grade school! Mostly because of 'balancing equations', but as an older person ...l seem to like what you do a lot! Thanks up loader!

Yo who's here from 2024 tryna see if that orange bear is still orange

You're awesome dude. This type of channel is what makes RU-vid so great.

Appreciated the tidbit about how you handled the chemical waste after performing the solvent extraction with the sep funnel! I'd mentioned before how a video on after-reaction chemical waste management would be really helpfull so I appreciated you taking a sec to describe how you delt with the ether laden aqueous solution after performing the extraction :)

Who needs Chemistry Class when you got NileRed?!😂

I LOVE YOUR CHANNEL!!! I literally can't do basic addition but I love watching your experiments and your voice has such an ASMR vibe to it. Thanks for helping me procrastinate all my homework!

1:07 my mind has been rotted my brain rot 💀😭

"But I was impatient" - NileRed, every video "eDiT: OmfG ThaNX GauysS fOr THe LiKEs I've nEvR Hit 100 LIKeS on A cOmmEnT" nah jk

"Teddy bear mould" I know a fleshlight when I see one.

Me: you should make sodium bromate You: na bro

The comments are so old that there's no sigma jokes💀💀He doesn't even know what's gonna happen in a few years then

every time he adds a stir bar it just reminds me of my 10th grade chemistry class which was just like: my chemistry teacher: "NOOOOOO YOU CAN'T JUST FORGET THE INDICATOR!" me: "hehe stir bar go spin"

do you ever get that idea while mixing stuff like, "I wonder what kind of death would arise from drinking this mixture whose chemical components are too complex and understudied?" or its just my ignorance.

"Tell me your biggest secret" Nile: "Where's my heatgun?"

This is what I love about this channel: Not only do we learn really well from your practice, we also run into many mysteries with you, the solving of which would only be even more informative. Like, why did water fix it? Why did the epoxy reverse the process? So many questions!

As a resin artist (but a failure at chemistry), I was excited to see Nile use resin. And yes, it's often a "pain" to demold our creations.

Many epoxy resins do have UV absorbing substances, some kind of inhibitor, so the UV doesn't attack the resin itself. This is probably why it didn't convert fully and pretty slow. Why it is in reverse, I have no idea.

For your photography, those printed transparencies are not as opaque as you'd think, and doing contact exposure in a broad light like the sun its really hard to get good contrast even at short exposures. You'd have better luck with more diffuse light for a longer time.

14:50 AMOGUS

I've learned so much more about chemistry through this guy than my entire time through high school...

So this is the second video of yours I’ve watch, I’m in quarantine and I’m learning more from your videos than I ever have from college lmao

Watching this in the dark hurts my eyes but the knowledge is so worth it and it's so entertaining to my chemist mind

soak the paper in a solution then lets it dry. that way it wont have the streaks from applying it

One of your most interesting videos, even though it asked more questions than it answered. One thing: most resins continue to harden for a long time after they get seem to set (as I think you've shown before). I wonder if this is why the colour changes stop after a while: the resin has now fully cured.

It would be super cool if you can grow a single large crystal of DNBP

14:40 Ngl that mold is kinda sus

put it in a pen and use it as invisible ink

*Every single photographer in existance before the 1960s*

The contrast is low on your prints because of the low concentration of pigment in the paper. Try doing multiple applications with drying cycles in between to deposit more pigment. Also, you could try to create an emulsion of the pigment in agar or gelatin and pour it over the paper while it is glued to a piece of glass. You can also improve contrast by increasing the density (make the dark areas darker) of your negative in photoshop to prevent the light bleeding through and exposing the areas underneath. edit: you could also try creating a nitrocellulose film impregnated with your pigment, or applying the pigment as an emulsion over a plastic sheet. Then when you expose the print, place it on a black surface to prevent backscatter from exposing the protected areas.

Gelatin film? Nice old tech for distributing photosensitive chems on paper.

13:31 YES, I was about to say this would make a very cool spy photograph thing, where one spy oculd send pictures to another that would imediatly start to dissapear and never come back

Bear changing color: Take acrylic paint. It's nasty and sticks just everywhere. Mix in a bit soap tensides and also some gasoline to make it more fluid. Not too much! If you apply brown color on any polar bear, the acrylic paint will quickly soak the whole pelt through. Voila, grizzly bear. You can experiment with various colors and additives. Maybe some drops of acids could help with the binding to the hair.

Are we just gonna pretend he isn't magic? 🤔

3:49, That's some good looking orange juice.

"Be careful with the ether as it poses a fire hazard" 5:57 Proceeds to spill it all over the work bench. hahaha! I don't know hack about chem but I love your videos!

I feel like the bear can be used as some kind of timer, where you "charge" it under sunlight and use it to tell time when heading to places with no sunlight.

Chemistry and physiology were my best subjects in hs and I still have no idea what he's saying half the time. Pretty advanced/not advanced channel! Perfect.

Professor Jim, the poor old soul, alas he is no more for what he thought was H2O was H2SO4.

Secret Messages?? *The FBI wants to know your location*

I would be interested in finding out other applications for this like car paint , but as for your bares I watch a lot of Peter brown and he always speaks of heating when mixing , it would be really cool if you and he got together and made something ! I love your videos even though I don’t understand chemistry, I wish I did. Keep it up bubba :)

15:28 you just made Monokuma In fact if you look hard enough you can see the eye scar and gritted teeth on the black side!

I've been seeing a lot of videos of people making guitars from resin with stuff in it (colored pencils, legos, paper), making a guitar that starts out orange and changes over the course of the set as it's out of sunlight would be cool

I love how in every episode the Sigma is exposed of brutal overpricing :D

16:45 -Hey mom! Did you see my yellow plastic teddy bear? Yeah, it could also eventually turn blue! What do you mean I'm crazy?

15:29 Monokuma

8:00 nile making drugs

I have a plastic frisbee that's translucent/clear in the shade and a cloudy purple when exposed to sunlight. We bought it as a "new science" product on an Alaskan cruise about fifteen years ago.

What if you spread it in as just Acetone, and then soaked the paper in water

NileRed always inspires me to become a chemist

"Hey dad is the milk in the fridge still good?" "Yeah" The milk: 4:17

nari from metaware highschool would've eaten those gummi bears faster than you can blink if they were actual gummi bears

i love falling asleep to these videos and waking up w knowledge i didnt know i needed

Why not prepare a large plate of the mixture of DNDP, acetone and water and place the whole paper in it? Take it out using tweezers then develop it as normal

I was wondering if you could do a video all about yeast and some cool things you can do with it... Natural yeast function, getting the niacin out of it, how it reacts to acids/bases... whatever you can make out of it.... Lol you can even make bread or something... fancy like...

This is the type of science I was hoping to learn from school

@Nilered: Use the powder as a printer toner. Print the entire surface of a sheet of paper with toner colour DNBP. A laser printer that handles white toner should be the easiest to open up and replace the toner content from. Unless this stuff is particularly sensitive to small electric charges used in the printing process, you should have no issues using this material as toner powder.

I love how this guy talks like we are equally as intelligent as he is while still explaining what's going on. It makes me feel smart even tho I only under stand like 20% of what's going on 😆

Probably the solid state of the epoxy prevents the oxygen from moving back into a higher energy state? Did ya try to heat one of the bears to convert it back? Also, some Photochromic pigments lose their color when you hit them with a low energy laser, like a green Laserpointer

This reminds me of antique glass, I can't remember what it's called off the top of my head but they made dishes and cups and glasses out of it and when it was exposed to the sun over time it would turn deep purple

4:06 it looks like some dank orange juice

Next time, before you fill the mold... put in a little skeleton bear. That way, when you put it in sunlight, it will become clear and then you can see a "spooky skeleton bear surprise".

I love the vagueness of the statement. “According to a paper I found.” On the street? In his cereal? Where did he find this paper… probably online.

With the epoxy, it typically produces a ton of heat. Perhaps the compound's natural interaction with heat caused some issues.

“Dissolved into the Aether” Just like dad going to get cigarettes

Best chem channel out there

It's actually cool it works backwards. It's like bear collecting the sun. During the day it's a sunbear, and at night it's the bearer of darkness

For the photographic paper.... what you made was the equivalent of VERY early 1800s photographic paper.... silver nitrate solution brushed onto paper. Its primary weakness was lack of (visual) saturation, because the blacks didn't get very dark, due to a lack of silver salt (chloride and/or iodide and/or bromide) crystals. The solution is to make an emulsion. Modern day emulsions are made from "hard" (acid-dissolved, high melting temp) gelatin, into which the photosensitive chemicals are mixed, and layered on (in, of course, complete darkness, because silver salts are so light-sensitive). In the 1800s, such emulsions were made with egg white, to make what was called "albumen prints" Albumen paper is made by carefully breaking bird eggs (don't break the yolks), and pouring off the clear liquid to separate container use while using a coarse barrier to keep the yolks in the original container (even a coffee cup and a finger held to create a small opening for the white to pour out through can work in a pinch.) Paper would be hand-coated, by paint brush) with a silver-salt-in-egg-white mixture, and each sheet hung by the corner in a dark room to dry using a paperclip or laundry clothes pin. After this layer dried, the paper would be unevenly coated, with a diagonal gradient away from the top corner towards the bottom corner. The solution is to coat the paper a 2nd time, and hang from the opposite corner. My understanding is that the egg white emulsion smells TERRIBLE while it's drying (So, you might want to do this outside on a length of twine hung in a garage or a shed). You still want to do it inside a building, because you don't want dust getting into your egg white, and you don't want the wind whipping it around. Putting a fan in the room for GENTLE air circulation isn't a problem. Room should be reasonably dust-free. Putting a furnace-filter capable of trapping dust (not just lint) on the intake side of a box fan works well as a dust-remover. If you have ever seen any black and white print on albumen paper with your own eyes, the quality is absolutely startling, even those which were created during the 1860's, due to the barely visible thickness of the albumen emulsion. These were all handmade using zero automation, as nobody had come up with a way to quickly dry albumen paper in a horizontal position, and hanging uses so much less space (vertical orientation), and requires far less material (2 nails plus length of twine plus clothes pins, vs tables

13:25 ish When the water reactivated it. Possibly same thing as the invisible ink used in pranks?

1:55 s i g m a b a l l s

You videos just keep getting better and better! Keep up the great work!

Stepping in as an artist who uses a couple different paper types for watercolors and guoache: maybe instead of watercolor, which is much softer and VERY absorbant, try smooth finish cold press bristol paper? I know when I use it for watercolor mixed media paintings, I do have to pre-soak it like watercolor paper, BUT if you don’t pre-soak it, you might get a stronger image, as the negative print might sit more flush on it. And tape the edges down with painters tape. It’s a bit like burning a silk screen for silk screen printing. The print needs to sit totally tight and flush on the prepped silk screen in order to get a super sharp image when exposed to UV light. The print also needs to be a SOLID black and white, no light passing through the black, so bumping up the contrast should help. Yeah, I know, three years later. ^^

Sometimes videos like this make me think how cool it would be if I got a chemistry degree. I would love to make cool stuff like color changing bears.

3:50 FORBIDDEN MTN DEW

I think there is an error in the mechanism for the UV reaction you showed. The molecule has too many negative charges in the second structure. The initial hydrogen is transferred as a hydride, not a proton, so the carbon should be left with a positive charge instead of negative.

About the beaker mug, can you drink hot chocolate out of it :D

i don’t understand a single thing he’s saying but i can’t stop watching

Do you think the pigment can be used to dye clothes, or it's too toxic?