Abstract
In the normal method (the untwisted method) the highly trained skill is required and yet exact results can hardly be expected in measuring twists of the yarn which is twisted by the heavier traveller, after about 50% moisture has been given to and permeated through the cut-material in an air-tight container for a few days, as in Report III.
In the present experiment is has been examined whether the simple methods, known as the twist measuring methods of spun yarn, had some utilities or not, when they were applied to the paper yarn.
And it has been made clear that the breaking method with 10cm between two clips is found fearable.
N1: Times of twists until a test piece is strained to be broken, after the piece, festened between two clips (the distance is L) has been twisted in the same direction as that of the test piece.
N2: Times of twists until a new piece is strained to be broken, the piece been twisted in the opposite direction, untwisted thoroughly and kept twisting on. and times of twists of yarn: N=(N2-N1)/2
