The Indian Central Jute Committee. Technological Research. Memoir No. 2. The Relation Between the Physical Fibre Characters and the Spinning Quality of Jute - I

It now remains to describe the procedure employed in preparing the small working samples for the various physical tuts from the larger sample (normally :3 lb.) whichis taken from the fibre that is spun In the present work fibre tests have been made only on the middle portion of the fibre the root and crop ends being excluded. [...] In the case of say wool a very good estimate of fineness can be made either by cutting the fibre to a definite length and counting and weighing a fair number of strands or by projecting the magnified image of the fibre on to a screen and so measuring the diameter directly. [...] The work absorbed in breaking the test-sample is taken as the difference in height (as read on the scale) to which the pointer is pushed when no sample is clamped in the jaws and the height tc which it is pushed when the sample is broken. [...] Apart from such characters as colour and sckiness most of the information required in assessing the quality of a yarn and hence of the fibre from which it was spun is given by the quality ratio (single thread breaking load divided by grist and for convenience multiplied by 100) considered conjunction with the coefficient of variation of the weights of standard (2-inch) lengths which is a me [...] It is only to be expected that the quality ratio of the yarn will be fairly closely related to the ballistic work of rupture of the fibre but it is to be noted that the relation between Q. and B/M (Fig.