Message text written by "John Carmichael" >Porcelain is a vitreous enamel which means that it is composed of glass frit (fine dust sized particles of glass). It requires HIGH firing temperatures of about 1500 degrees F. and kiln-type ovens. But the enamel and powder coatings used on car parts or lawn furniture is more like traditional paint and is baked at much lower temperatures- about 350 degreesF.<
Thanks for that John, pretty clear one doesn't want the vitreous/porcelain stuff on a car because it must shatter if bent! However, the interesting thing is whether or not the fired enamel paint and powder finishes would be just as good as dial finishes. I shall ask Chris Daniel (who is not a member of this list as far as I know) about what he thinks the finish was on St Margaret's. Patrick. --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
