Matt, imaged glass tools are of two varieties. The most common is purchased from Kodak coated with emulsion just like polyester film is coated. You may plot on it with a flat bed plotter, or contact print it. Then to process it you generally lay it flat in a tray, emulsion up and pour developer chemistry onto it. Swoosh it around for a few minutes, pour it off, add stop bath for a few seconds, pour it off then add fixer for a few minutes, rinse well and dry. (The data sheet will have exact chemistry, temperature and times.) Imaged plates of this variety are dimensionally stable but are expensive and easily damaged. I have also purchased glass plates with a layer of chromium on them coated with photoresist. This can be contact printed from silver artwork, developed, then chemically etched to remove the chrome from the non image areas and resist stripped. This makes a scratch resistant, imaged glass plate. Still expensive and easily broken. What is much more common today is to purchase clear glass books and use vacuum or tape to hole film artwork in place. These have been referred to as glass phototools and may be what you are referring to. They are available from several companies like Precision Art Coordinators, Byers Inc. or C.A. Picard. The caveat with glass books is that often the glass is very flat and the product can be less than flat. The resulting off-contact can cause defects. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************