You can recrystallize it with ethanol, then the salts are out. In fact, carmine is also used as a food coloring - I've eaten it in chocolate candies many times. Since many kinds of insects are now generally permitted for processing in food in the EU 🤢, this is no longer important anyway. Be careful with accidental inhaling the dye powder - not for people with house dust mite allergies/asthmatics!
Thanks for the tip! Especially about the ethanol. I was actually going to try that, but I didn't know this formed crystals.. is it the salt that forms crystals or the pigment itself? Either way it would work for separation I'm just not sure how..
@@integral_chemistry Carmine which is mainly carminic acid forms no crystals and is soluble in ethanol. Deprotonated in alkaline solution it's moderately water soluble and maybe kind of crystaline in solid form.
This has been the standard red food colorant here in Sweden and also I guess the rest of Europe for as long I have lived and eaten candy and probably much longer back still (Im born in the 80s.) Carmine is also known as E120. Never knew it also works as a ph indicator though.
This is amazing. I’ve been trying to find a way to reproduce real crimson lake. Nobody makes this anymore. And for a historic art project I need the real stuff. Mine would be for watercolour.
Yep! It's open source from the 1800s. It's called "The manufacture of mineral and lake pigments: A textbook for manufacturers, merchants, artists, and painters" by Dr. Josef Bersch
@@integral_chemistry thank you! I needed a text to sit down and go over. These may be interesting experiments to conduct in front of the students. Show them the BTS and origins of manufacturing our every day items.
You can recrystallize it with ethanol, then the salts are out.
In fact, carmine is also used as a food coloring - I've eaten it in chocolate candies many times.
Since many kinds of insects are now generally permitted for processing in food in the EU 🤢, this is no longer important anyway.
Be careful with accidental inhaling the dye powder - not for people with house dust mite allergies/asthmatics!
Thanks for the tip! Especially about the ethanol. I was actually going to try that, but I didn't know this formed crystals.. is it the salt that forms crystals or the pigment itself? Either way it would work for separation I'm just not sure how..
@@integral_chemistry
Carmine which is mainly carminic acid forms no crystals and is soluble in ethanol. Deprotonated in alkaline solution it's moderately water soluble and maybe kind of crystaline in solid form.
This has been the standard red food colorant here in Sweden and also I guess the rest of Europe for as long I have lived and eaten candy and probably much longer back still (Im born in the 80s.) Carmine is also known as E120. Never knew it also works as a ph indicator though.
This is amazing. I’ve been trying to find a way to reproduce real crimson lake. Nobody makes this anymore. And for a historic art project I need the real stuff. Mine would be for watercolour.
Very good. That dye behave similarly to alizarin.
I wonder if you decrease the ph level, you can get more reddish tone than purplish?
I live in Arizona and you’ll see these guys just in the wild on cacti
I would like to make carmine watercolor aside from adding a honey based binder is the technique the same as what you showed us ?
i often eat bugs
turns out..
Where do you find these pigment origins and methods? Are you following a text?
Yep! It's open source from the 1800s. It's called "The manufacture of mineral and lake pigments: A textbook for manufacturers, merchants, artists, and painters" by Dr. Josef Bersch
@@integral_chemistry thank you! I needed a text to sit down and go over. These may be interesting experiments to conduct in front of the students. Show them the BTS and origins of manufacturing our every day items.
Have you tried to lake it on something other than alum?
I have not, the old text I used just called for alum but I'm sure it could be laked onto several different molecules
@@integral_chemistry Hi 👋🏼. Thanks for your reply!
is it lightfast?
Extremely fugitive. It will eventually turn magenta pink
thats scary