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Using BREAD as a foundry


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Pyrolized Bread Metal Casting Foundry

Well earlier today I found this video posted yesterday by one of the guys I subscribe to on YouTube. He isn't the most safety conscious person, but he is an experienced machinist. The entire set up should of been outside, but its his house right? 

Its an interesting concept and he understands it and enjoys nerding out on the scientific to those of us who are not as, well you know...


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Kind of make shift safety and shop practices but fun concept. I wonder how much you could add to bread dough to make a better insulating refractory. Seriously, just for a mind voyage start, mix fire clay, sugar, flour and wet it with Veegum in suspension, place the dough in a mold allow it to rise and bake it.

I've wondered about using club soda to mix water set refractory but the aggregate would allow CO2 bubbles to escape. While it's looking like we can use additives to reduce or eliminate porosity that would trap steam too and steam in the refractory is a B-A-D thing. POW!

Of course we could try the biscuit method, mix a small amount of baking soda with the dry refractory and a % of vinegar in the water. Letting it heat rise like biscuits wouldn't work it has to do it's rising while still wet enough to be plastic. 

Fun mind voyages and brainstorming idea, thanks for the link.

Frosty The Lucky.

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2 hours ago, Frosty said:

Fun mind voyages and brainstorming idea, thanks for the link.

I thought it was interesting and I don't mind sharing stuff like this with you all.

I personally think this is a cheap alternative to refractory, how much will a loaf of bread cost you? It could cost you pennies if you already have the baking stuff. of just a dollar or two depending on where you live or shop.


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Melting aluminum inside leads to another safety concern about the smoke and fire hazards. The smoke coming off the process is a real concern. Setting the plastic cutting material on fire and then letting the fire just burn frightens me. Again the smoke of the burning plastic is a real concern.

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Well as I say its his brain and if he wastes it, well its his own causing.


*I believe he has a "professional" shop which most likely has ventilation of some sort. He also always has the garage door open when ever he is burning something in any other videos*

Edited by Kaleb
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Jim Wilson had a building that would cover two 18 wheel tractor trucks AND trailers. One end of the building was totally open, the other end was one half covered.



He was burning the galvanized coating off some pipe in his gas forge, located in the middle of the building. See the stack above the roof. This was the total amount of pipe that was put into the gas forge, only a dozen or so pieces.

galv pipe.jpg


He had COPD and other issues and the fumes sent him to the hospital. Total time from fume exposure to death was only a few weeks.

We push safety on IForgeIron for a reason. Burning plastic, Styrofoam, and other things that produce smoke in the video is a BAD idea. Indoors it is a VERY BAD idea.


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Informtion about phosgene.

Phosgene is ranked a 5 out of 7 in toxicity by the #Scorecard making it in the top ten percent of toxic substances. No antidote exists for phosgene.

According to the National Institute for Occupations Safety and Health (NIOSH), a toxic level that can place a person’s life and well-being in jeopardy can be as low as 2 parts per million (ppm).

Phosgene gas is a byproduct of some refrigerants when they are exposed to an open flame, or extreme heat. Being extremely toxic in small amounts, phosgene formation was a real concern when traditional refrigerants (R11, R- 12, R- 113, R- 114 and others) decomposed.

The chemical in the brake cleaner is Tetrachloroethylene. When this chemical is exposed with excessive heat and argon (used in MIG and TIG welding) it also produces phosgene.


Phosgene is also known as carbonyl chloride (COCL2). It is formed when chlorinated hydrocarbon compounds are exposed to high temperatures. Its boiling point is 8.2°C, making it an extremely volatile and non-persistent agent.

in case of phosgene exposure, one should leave the area of the phosgene release as quickly as possible. Remove clothing and wash entire body with soap or water and get to a medical care facility as quickly as possible.  Exposed clothing should be removed keeping it away from the head (cut off shirts if necessary rather than pull them off over the head) and should be sealed in a double plastic bag if possible.

If one has ingested phosgene, do not induce vomiting or drink any fluids. Treatment for phosgene centers around removing the phosgene from the body as quickly as possible because no antidote exists for phosgene.


How people can protect themselves and what they should do if they are exposed to phosgene

  • Leave the area where the phosgene was released and get to fresh air. Quickly moving to an area where fresh air is available is highly effective in reducing the possibility of death from exposure to phosgene.
    • If the phosgene release was outdoors, move away from the area where the phosgene was released. Go to the highest ground possible, because phosgene is heavier than air and will sink to low-lying areas.
    • If the phosgene release was indoors, get out of the building.
  • If you think you may have been exposed, remove your clothing, rapidly wash your entire body with soap and water, and get medical care as quickly as possible.
  • Removing and disposing of clothing:
    • Quickly take off clothing that has liquid phosgene on it. Any clothing that has to be pulled over the head should be cut off the body instead of pulled over the head. If possible, seal the clothing in a plastic bag. Then seal the first plastic bag in a second plastic bag. Removing and sealing the clothing in this way will help protect you and other people from any chemicals that might be on your clothes.
    • If you placed your clothes in plastic bags, inform either the local or state health department or emergency personnel upon their arrival. Do not handle the plastic bags.
    • If you are helping other people remove their clothing, try to avoid touching any contaminated areas, and remove the clothing as quickly as possible.
  • Washing the body:
    • As quickly as possible, wash your entire body with large amounts of soap and water. Washing with soap and water will help protect people from any chemicals on their bodies.
    • If your eyes are burning or your vision is blurred, rinse your eyes with plain water for 10 to 15 minutes. If you wear contacts, remove them and place them in the bags with the contaminated clothing. Do not put the contacts back in your eyes. If you wear eyeglasses, wash them with soap and water. You can put the eyeglasses back on after you wash them.
  • If you have ingested (swallowed) phosgene, do not induce vomiting or drink fluids.
  • Seek medical attention right away. Dial 911 and explain what has happened.

How phosgene exposure is treated

Treatment for phosgene exposure consists of removing phosgene from the body as soon as possible and providing supportive medical care in a hospital setting. No antidote exists for phosgene. Exposed people should be observed for up to 48 hours, because it may take that long for symptoms to develop or reoccur.


This information has also been posted in the safety section so it is easy to find.

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This article caused me to go through all the cleaners in my shop and remove ANY chlorinated ones. Modern carb and brake cleaners don't contain chlorine. There was a post on IFI related to the above article where someone had used a chlorinated solvent in the shop and the UV from arc welding across the shop generated phosgene from the fumes some time later. 

Frosty The Lucky.

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