20—OPACITY AND OBSCURING POWER OF TEXTILE FABRICS
- 1 May 1965
- journal article
- research article
- Published by Taylor & Francis in Journal of the Textile Institute Transactions
- Vol. 56 (5) , T260-T273
- https://doi.org/10.1080/19447026508662283
Abstract
The opacity, C, of a textile fabric, white or plain-coloured, is defined as the ratio of the values of surface luminance, Y, when it is lying on a black and on a white background: C = Yblack / Ywhite . A simple and convenient method for measuring this quantity is described. The opacity of fabrics classified by end-use is recorded. The dependence of opacity on fabric colour has been shown to agree with expectations based on an approximate theory. The screening of net curtains has been found to depend, not on opacity as defined above, but on a function, TY 2, of the open area, T, and luminance, Y.Keywords
This publication has 3 references indexed in Scilit:
- 2—A DIRECT-READING COVER PHOTOMETERJournal of the Textile Institute Transactions, 1962
- Optical Studies: I–Relation of Colour to the Apparent Soilability of Textile MaterialsJournal of the Society of Dyers and Colourists, 1959
- Optical Studies: II–SMR Values for a Comprehensive Range of ColoursJournal of the Society of Dyers and Colourists, 1959