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Details van artikel 34 van 120 gevonden artikelen
| Titel: |
31—COMPARISONS OF MICROPROJECTION AND AIR-FLOW DIAMETER MEASUREMENTS FOR SCOURED WOOL |
| Auteur: |
Henning, H. -J. McKelvie, Dawn R. |
| Verschenen in: |
The journal of the Textile Institute |
| Paginering: | Jaargang 60 (1969) nr. 10 pagina's 430-440 |
| Jaar: |
1969-10-01 |
| Inhoud: |
A comparison is reported of fineness results obtained for 27 lots of scoured wool by the projection-microscope and air-flow methods. The sampling of the scoured wool was done by core-boring, and the cores were hand-carded before air-flow tests were made. The sub-samples for projection-microscope measurement were cut into snippets 1 mm long in order to obtain a length-biassed sample. The air-flow apparatus was calibrated with reference tops in five different forms. The results show that there exists a systematic difference between the air-flow and projection-microscope mean diameters of scoured wool when the air-flow instrument is calibrated with reference tops in the original state. A better agreement results by hand-carding the test samples of the reference tops, but the closest agreement is obtained by cutting, washing, and hand-carding these test samples so that their condition is similar to that of the core sample being tested. Provided that this kind of calibration were applied, the mean diameter of washed wool could be determined by air-flow testing of cored and hand-carded samples. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 34 van 120 gevonden artikelen
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