Archived posting to the Leica Users Group, 2002/03/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Lets put this in perspective. Ten metric tons is about what your normal dump truck is carrying around in its bed. For the sake of argument lets assume that the kinds of glass that Leitz would be making are the extremely dense high refractive or anomalous dispersion glass. Let further assume that this is twice as dense as sand that a dump truck might be carrying. That would imply an approximate volume half a bed load. Gals and guys, this isn't a lot of volume. And if it is a lab, not all or even most of the melts will go well, many will be defective in clarity, dispersion, bubbles, physical properties, etc. As an example, a reason given to me for the location of ÉLCAN in a relatively remote region was the very high refractive glass needed years to cool so as to retain critical physical properties. As a story this has some play with me as the use of ED glass has increased dramatically in recent years as if the designers knew what they needed but had to wait to use it. For volume of production, in recent years I think 85000 units was a high point with most years being closer to 35000 units. Don dorysrus@mindspring.com - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html