What material has the lowest melting point?

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SUMMARY

The discussion centers on identifying materials with the lowest melting points suitable for writing with invisible ink. Hydrogen has the lowest melting point at -259°C, but its use is impractical for this application. Participants suggest looking for volatile materials that volatilize around 35-40°C without reacting chemically with paper. Flash paper is mentioned as a potential option for its quick combustion properties, which could align with the goal of making invisible ink undetectable through heating.

PREREQUISITES
  • Understanding of melting points and material properties
  • Knowledge of invisible ink and its development methods
  • Familiarity with volatile substances and their applications
  • Basic principles of cryptography and security measures
NEXT STEPS
  • Research materials with melting points around 35-40°C for practical applications
  • Explore the properties and uses of flash paper in cryptographic contexts
  • Investigate alternative invisible ink formulations that require low heat for development
  • Study the implications of using volatile materials in security and secrecy
USEFUL FOR

This discussion is beneficial for researchers in materials science, cryptographers, and anyone interested in the practical applications of invisible inks and low melting point materials.

INFINITE952
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What material has the lowest melting point? I'm doing an interesting research project of finding an invisible ink. My purpose is to find a material on which I can write on and has a very low melting point. I want to write on this kind of material by using my invisible ink.

From my research about the invisible ink, I know that to develop the ink, heating the document will be the first method that everyone can think of. Therefore, I want to find a low melting point material to prevent my secret ink from detection which means the material will burn immediately when someone tries to heat it. I really don't know what material is my first choice. So I come here to seek for answers. Plastic is better. Thanks a lot.
 
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INFINITE952 said:
What material has the lowest melting point? I'm doing an interesting research project of finding an invisible ink. My purpose is to find a material on which I can write on and has a very low melting point. I want to write on this kind of material by using my invisible ink.

From my research about the invisible ink, I know that to develop the ink, heating the document will be the first method that everyone can think of. Therefore, I want to find a low melting point material to prevent my secret ink from detection which means the material will burn immediately when someone tries to heat it. I really don't know what material is my first choice. So I come here to seek for answers. Plastic is better. Thanks a lot.
Well, for the lowest melting point, hydrogen has the lowest melting point at -259 C, but I don't think one wants to use some cryogenic ink. One needs to ask a different question.

I think one needs something volatile that volatilizes around 35-40C, without chemically reacting with the paper. I also should be clear.
 
"007" style cryptography? Flash paper. Water soluble keys for "Enigma." Any information written on "this" with invisible "that" is an open book if it falls into competent hands. "Two people can keep a secret so long as one of them is dead." Churchill, Ben Franklin, whoever said it.
 
Helium has the lowest melting point
 

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