http://earthwise.bgs.ac.uk/index.php?action=history&feed=atom&title=File%3AP528151.jpg 2026-04-03T21:46:50Z Revision history for this page on the wiki MediaWiki 1.42.3 http://earthwise.bgs.ac.uk/index.php?title=File:P528151.jpg&diff=32004&oldid=prev 2017-08-02T18:07:40Z

<p>User created page with UploadWizard</p> <p><b>New page</b></p><div>=={{int:filedesc}}==<br /> {{Information<br /> |description={{|1=A collection of specimens of rough block mica from the Little Scatwell mica prospect, eight miles from Strathpeffer, Ross and Cromarty. They have undergone very little processing other than extraction and some rough shaping and splitting - a process known as rough dressing or rough cobbing. British Geological Survey Petrology Collection sample number MC 7759. Beyond this the mica would undergo further processing, further splitting and then trimming to remove imperfections. The preparation of block mica for industrial use was a highly specialized task and the workers employed, young girls recruited locally, had to undergo many weeks of training though it was possible to judge after only a few days if a girl had the aptitude for the work. The trainees? first task was to master the technique of cutting the mica quickly and cleanly and from there they learnt how to extract the largest possible plate with the minimum of waste, how and when to remove interlaminar stains by splitting, and how to remove damaged films from the surface of the block as thinly as possible. Once trained a worker could produce from 4.5 lbs. daily for the smaller grades to 16 lbs. for the larger grades.P528151.}}<br /> |date=2017-08-02 19:05:42<br /> |source=British Geological Survey<br /> |author=British Geological Survey<br /> |permission=<br /> |other versions=<br /> }}<br /> <br /> =={{int:license-header}}==<br /> {{subst:Custom license marker added by UW}}<br /> {{BGS}}<br /> <br /> [[Category:Uploaded with UploadWizard]]</div>

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