What you need to have
The fire is lit using a plastic bag; you can use food packaging. In the forest you should find dry bark, grass, branches and have access to water.
Process of lighting a fire using a plastic bag
The only precondition is sunny, dry weather. By the way, if there is no water nearby, you can use your own urine to light the fire, but the effectiveness will be lower.
Break off a piece of bark from a dried tree to make tinder.
On two large stones, crush it into a fine powder. The smaller and drier it is, the faster the fire will ignite. Another tip is to make tinder using dark materials, they absorb solar energy as much as possible.
First, crush the bark with stone blows, and then, using them as millstones, grind them into dust.Divide the amount received into approximately two parts, pour them onto pieces of bark.
Collect dry branches with a diameter of approximately 0.5–1.0 cm from the ground, and break dried ones of a smaller diameter from the trees. Try to take the thinnest ones, this will make the lighting process easier.
Prepare a handful of dry grass; finding it in the forest is not a problem. If the hay is damp, spread it out in the sun and dry for a few minutes. When bending, the stems should break, not bend.
Lay out the prepared materials on a flat, dry and well-lit area.
Ignition is done in the following order: first, tinder from the bark is ignited, then dry grass, thin branches and thick branches. After this, you can add ordinary wood to the fire.
At this point, the preparation of flammable materials is completed, you can begin to manufacture the lens, the success of the business depends on its quality.
Empty the food bag. It should be clean, transparent and fairly durable. Fill it halfway with water.
Tilt the bag to the side, water will collect at one corner of the bag, and the excess will pour out. Pick up the empty ends, try to leave as much of it as possible inside. The larger the diameter of the lens, the more heat rays it collects, the higher the temperature at the fixation point.
Twist the ends with sufficient force, the bag should take the shape of a sphere, try to ensure that it has as smooth a surface as possible. Pull it gradually, do not apply too much force, otherwise the polyethylene will not hold up and will break. If there is one more bag, great. If not, you will have to use other methods of starting a fire.
Hold the sphere over the tinder bark and focus the rays on the surface of the material, making sure that no drops of water fall on the powder.After a few seconds, smoke will appear, increase the ignition area, shift the focus a little.
Add another portion of powder on top and heat again with the sphere. Make sure the powder glows without the lens.
Make a thick rope of dry grass and pour the smoldering tinder onto it. First cover the bark with hay and then carefully turn the whole thing over. Thanks to this technology, a small fireplace will continue to smolder, rather than crumble and go out.
Cover it on all sides with grass; to increase the amount of oxygen, carefully blow on the ignition site.
As soon as an open fire appears, quickly place the thinnest branches on top, followed by slightly thicker ones. Continue blowing on the fire until they are reliably ignited.
All that remains is to throw in large firewood and use the fire for its intended purpose.
Conclusion
We have described only one method of ignition using the sun's rays. A lens can be made not only in a spherical shape from a bag; there are options for making flat ones, but with their help it is more difficult to light a fire.
