Making prussian blue

I used peach pits here but it works the same for cherry pits: <a href="https://www.youtube.com/watch?v=Xe7QZMPZtcc" rel="nofollow noopener" target="_blank">https://www.youtube.com/watch?v=Xe7QZMPZtcc</a>

CodyDon Reeder

Hi Nile, Instead of Hexacyanoferrate (II) could we use hexacyanoferrate (III)? .. If we cannot, how would you reduce it?

You should have already almost all you need for trying to make a daguerrotype. Mercury, iodine, bromine, silver salts and a copper plate. And a dark room, because the sensitization process and subsequent steps require low or no light (dark red light should be safe). The best way to apply silver to a copper plate IMHO is by using Tollens' reagent. I would try it myself (I used to do a lot of dark room work in my youth, I was the "official" photographer of my high school) but don't have any mercury, and there is no substitute for that.

Silviu T

Probably treated with a mix of ferric and ferrous salts. There are small amounts of HCN in the pits of many Prunus genus seeds, which explains that. It's released from the hydrolysis of amygdalin, a glycoside which is also the precursor of benzaldehyde which you used in a recent video. NB it's safe to eat in small amounts; I use sour cherry pits and apricot pits to make kirsch, a cherry-flavored brandy, and also to flavor a cherry cordial. Part of the flavor comes from the benzaldehyde and the HCN. :)

Silviu T

The cyanotype is a contact process, it needs a negative that is placed in contact with the sensitized plate and exposed to light to form the positive latent image. You can make a cyanotype of anything as long as you have a negative image of it. It cannot be used in practice to make negatives itself because of the very low light sensitivity which requires long exposures.

Silviu T

ohh thats what you mean. For benzene rings, which are fully conjugated, it doesnt matter

Nile Red

I plan to visit a bunch of them! Just when is the question. I end up getting side tracked so easily

Nile Red

I love these your pigment videos. It would bee cool to see some cyanotypes of algae or some other natural structure for the next one.

Simon the Delusional

I'm late to the party, but I'm very interested in your project for making ferricyanide-based blueprints. Since you're getting a bit into photochemistry, how about making a series of it. The history of photography is quite interesting; you could start with making a daguerrotype, then cyanotype (which is what you're working on), platinotype, gum-dichromate (which I've used in the past, not with great success), collodion process etc.

Silviu T

That was awesome

There are two single bonds attached to the benzene ring, one to the OH and the other to the ester functional group. My question was, should they be attached to either end of one of the benzene ring's double bonds, or to the ends of two different double bonds? Or does it matter? For example, wikipedia shows it your way, but many other places show they are attached to either end of one double bond, like here: <a href="https://www.sigmaaldrich.com/catalog/product/sial/m6752?lang=fi&amp;region=FI&amp;gclid=CjwKCAjwrqnYBRB-EiwAthnBFirYNPetocuZETBi9p2Xe6-deBIIjBUuSEX-RCAzELkh3yIN" rel="nofollow noopener" target="_blank">https://www.sigmaaldrich.com/catalog/product/sial/m6752?lang=fi&amp;region=FI&amp;gclid=CjwKCAjwrqnYBRB-EiwAthnBFirYNPetocuZETBi9p2Xe6-deBIIjBUuSEX-RCAzELkh3yIN</a>

Lindy

In fact even B.A.L is just OK at best of removing enough THALLIUM from the body even if given in time. Some may argue that THALLIUM SALTS have no antidote.

Daniel Blake Shoemaker

Yes, Prussian blue CAN be effective for THALLIUM toxicity but only before 6 hours. Since it must be ingested and since thallium toxicity usually takes min 12 hours until Nausea, vomting, etc occurs this is sort of a myth that Prussian blue can stop accute thallium poisoning. Maybe chronic. Yes it can reduce exposure to cesium 137 more effectively than thallium Red Nile.

Daniel Blake Shoemaker

I think the methyl salicylate looks okay. What do you mean by off by 1?

Nile Red

Did you draw methyl salicylate incorrectly?

Lindy

Pretty much all right, except the first one is technically just ferrocyanide or ferricyanide (i didnt write the oxidation state of the iron)

Nile Red

Good call, thank you very much for pointing that out!!

Nile Red

Do you remember how you did it?

Nile Red

I made this from cherry pits once, perhaps you could try something similar?

CodyDon Reeder

Oh, I got the last one! [9-(diethylamino)benzo[a]phenoxazin-5-ylidene]azanium, aka Nile Blue.

Lindy

Have you made Nile Red yet?

Lindy

Prussian blue 3-methylindole (skatole) Acetylsalicylic acid Menthol 9-diethylamino-5-benzo[α]phenoxazinone (Nile Red) Caffeine Methyl salicylate (you've off by 1 on the benzine ring) Diethyl(5-imino-5H-benzo[a]phenoxazin-9-yl)amine ??? (Except it has a double bond to NH not NH2)

Lindy

I MADE a lab coat out of Prussian blue too.

Daniel Blake Shoemaker

Hmm any Iron (iron (II) sulfate + patassium ferrocyanide + small amounts of prussian blue. I did not want a strong acid like iron chloride due the release of Hydrogen cyanide gas.

Daniel Blake Shoemaker

I remember using iron chloride for etching printed circuit boards. It can dissolve copper.

At 3:42: the bottom part of the card should say "Ferric Chloride (Iron (III) Chloride)".

Marc Ethier

ooh totally looking forward to it, i use to build little blueprint long exposure cameras. ..

Adric Menning

Very cool. I've used potassium ferricyanide to bleach black and white prints. This should be really interesting!

Michael Aichlmayr

lol @ "In theory, if I were even lazier than I currently am"

Your art wasn't so bad! :)

Glen J Measday