Dave and all other PWB Fabricators using Chlorine gas , What action is being taken in response to the requirements to reduce on site gas to 1,500 lbs by May 26 , 1997 [ OSHA 1910.190] and the total elimination of gas by 6/12/99 Clean air act[ CCA 112 -r] Mike Covel HMSC Tucson , Az. [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: Cupric Chloride Etchant Author: [log in to unmask] at CCGATE Date: 4/7/97 8:54 PM One of our process engineers is contemplating changing the etcher chemistry. Potential changes include NaCl or sodium chlorate in traditional cupric chloride etching chemistry. Before initiating an evaluation of these changes, I would appreciate any responses to the following: Can anyone share any experiences (positive or negative) with using sodium chloride in cupric chloride etchant in order to increase etch rate? Are you currently using NaCl and if so, have you found any degredation of equipment due to corrosion? Any other comments? In the same vein, are there any Cupric etchers out there using sodium chlorate as the oxidant as opposed to hydrogen peroxide? Again, any positive/negative impacts? Thanks to any and all comments and responses. Dave Rooke Circo Craft - Pointe Claire *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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] * ***************************************************************************