I have three questions on moisture sensitive devices: 1. What is general practice on incoming / receiving inspection of moisture sensitive devices- which boils down to mostly FPDs and BGAs ? Traditionally, FPD packs were opened only at time of use but IPC STD 033 appears to be allowing all ( does not state clearly ) as resort to room temp desiccation as long as the exposure time is limited to max 8 hours. 2. New std IPC J-STD-033 states MBB with property WVTR as 0.002 while J-STD-786A specifies it as 0.020. When contacted MBB suppliers, they mostly states 0.020 in their spec sheet- can any one clarify ? I am also contacting IPC to check ? 3. As a user, what is general recommendation to reseal bags with ordinary bag sealer or vacuum sealer ? Why we need vacuum in any case. If it is moisture, wht not add extra desiccant to take care of moisture from entrapped air and unbaked carriers. IPC std does not address this query ? Ashok -- Ashok Dhawan P.Eng Engineering C-Mac Electronic Systems Inc. 1455 Mountain Avenue Winnipeg, Manitoba R2X 2Y9 Canada Phone: (204) 631-7208 Fax: (204) 631-7294 E-mail: [log in to unmask] www.cmac.ca