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METHOD OF MANUFACTURING "TERMITAL" CARANDASH
With the help of a " thermite " pencil, one can weld simple metal products. Its main advantages - the lack of external spring feeding is also compact. Externally, the pencil suggests a giant match.
A pencil is a piece of wire from ordinary carbon steel. Its diameter - from 2 up to 3 mm - depends on the thickness of the parts to be welded. The thicker the larger the diameter. Outside, a thermite jigger mixed with glue is applied to the wire. Its composition: 24% (by volume) of aluminum filings, (but not the alloy of silumin), as well as 76% of iron oxide. Particle size up to 0.5mm . At the end of the termite pencil - the seed, very similar to a match head. It consists of 1 elements (by weight) of bertolet salt and also 0.5 elements of small aluminum sawdust. Both components seem to be kneaded with glue. It is clear that the seed is needed to initiate the combustion reaction.
When welding is required to use the holder and the filter. It is impossible to extinguish an incompletely used pencil (for "economy"). And undoubtedly observe the measures of fire safety, water or sand is not difficult to get at all.