Hi, TechNetters: Does anybody know the present situation by using the ultra-filtration system to recycle the developer and the stripper which should be discarded after aging everyday. Are there many users or only some users in the States to use UF in this PCB or etching process? Hope to get some ideas about the marketing or the users experience in these alkali solution recycling. It is said to save much fee for treating the waste solution and COD problem. Thanks Chung J. Lee /Hsin-Sun --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------