Italian type shells

The tying coe generally use by the pyrotechnist is a rough brown 3-ply flAx of about the same thickness illustrate, known in the trade as "Italian Shell Twine". Because it is ix>t smooth, knots made with it hold firmly, even when not pulie up so tightly as to "choke" the tubing. A satisfactory type Is widely sold for tying packages. 

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