Dear all Hello I want to know about a IPC std.. 7720 and 7721 . what is the difference between them. is both are the rework std. How can we purchase that in a book form. How many pages have this std. Our requirements are 1. A std. which gives a guide line about the rework and modification of Tu. hole and SMD components. 2. Pad damage criteria, like how many pad/ track we can repair/allowed in a board. 3. Jumper wire modification. 4.components over a components modification. Pls. tell me the payments process or purchase add. in INDIA. With regards Pankaj Karnwal Quality Assurance Ext. 211 BESL A-4,Sec-5 NOIDA , 201301, INDIA e mail : <mailto:[log in to unmask]> Barco, innovators in image processing --------------------------------------------------------------------------------- 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 e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 ---------------------------------------------------------------------------------