Char cloth

Char cloth, also called char paper, is a material that is used as tinder when lighting a fire and is the main component in a tinderbox. It is a small swatch of fabric made from a natural fibre, such as linen, cotton or jute, that has been converted through the method of pyrolysis into a slow-burning fuel of very low ignition temperature. Pyrolysis is defined as "a of organic material at elevated temperatures in the absence of oxygen”. Although this material is usually made from swatches of organic fabrics, campers and outdoor enthusiasts have also discovered that a similar tinder can be made in the same way using cotton balls or tampons. This material when properly prepared will ignite with the slightest spark, making it very popular with campers, especially in harsh weather conditions when lighting a fire is more difficult as it has a very low auto ignition temperature of 349 °C - 455 °C. Applying the same principle that has been used throughout history by indigenous peoples, char cloth can help start a fire with only the help of flint and steel, it is then placed in a tinder bundle and blown into flames. It is easily made on a small scale making it accessible and popular in the domestic sphere and while cooking on campfires.
Usually, it is made by packing a swatch of fabric into a small, almost airtight, rectangular tin and heating it slowly and steadily over coals for a long period of time, allowing it to undergo . The material that remains after this process is complete is a black, fragile piece of cloth that ignites very easily, making it the preferred tinder when lighting a fire using flint and steel.
Technique.
Char cloth is the preferred tinder for campers and outdoor enthusiasts when lighting a fire using flint and steel as it ignites easily and provides a slow burning, hot ember to build the fire around. When struck against steel, a flint edge produces sparks. ‘The hard flint edge shaves off a particle of the steel that exposes iron, which reacts with oxygen from the atmosphere and can ignite the proper tinder’. With this flint and steel technique the char cloth will ignite and an “ember will flash through it” allowing for a fire to be built around the ember. Although the char cloth is slow burning, the spark will need to be fostered using small kindling materials such as dried leaves, small twigs or a tinder bundle.
Historical uses.
Char cloths have been used to light fires for centuries.
One of the earliest recorded uses of a char cloth dates back to a ninjutsu manual written by Hattori Hanzo in 1560 called the Ninpiden or Shinobi Hiden, or Legends of Ninja Secrets. The manual states how to make char cloth from either cotton, silk or paper.
“Crumple cotton, silk, or paper until it is soft. Divide it into small amounts, and dry-roast it until it is black, paying attention that it doesn’t burn white. Keep it within a tightly covered container and be sure to always have some at hand.”
Another use of char cloth was recorded by C. P. Mountford and R. M. Berndt in Making Fire by Percussion, where the introduction of char cloth to Australian Indigenous Aboriginals is detailed, saying the use of char cloth was easier than traditional methods.
Char cloth has also been noted as used by the indigenous people of Hawaii in 1940. In the Hawaiian Journal of History, when describing the smoking habits of the islanders, the use of char cloth to light tobacco is briefly mentioned as a method introduced by colonists to the Hawaiian people. “This was not a traditional Hawaiian way of starting fires but was the flint and steel method introduced from the West.”
In the historical non-fiction novel by Jonothan Timmons titled “Outlandish: A Human History of Violence in the Galapágos A Historical Non-Fiction Novel”, which aims to “relate the events concerning the settlement of Floreana Island in the Galápagos Archipelago in the early 1930's by European ex-pats”, char cloth is mentioned. Timmons writes that a European captain withdrew his oil cloth that contained his “tobacco and tinderbox, which held inside his flint and steel and bits of char cloth”.
Scientific Investigation.
The production of char cloth occurs when organic cellulose based fibres undergo pyrolysis, an irreversible chemical reaction that includes the of material in an inert atmosphere (in the absence of oxygen). At elevated temperatures of greater than 250 °C, cellulose decomposes to form considerable amounts of flammable products, one of these being bio-mass. "Biomass is a complex material, mainly composed of hemicellulose, cellulose, and lignin in addition to extractives (tannins, fatty acids, resins) and inorganic salts". Char cloth is a form of bio-mass, termed bio-char. Char cloth is the result of incomplete combustion, as oxygen is a limiting reagent in the reaction due to the limited oxygen let into the tin during the production process.