Hi Juliano- An easy one! The surface finish doesn't matter at this scale because the main concern is moisture uptake on the PCB. Of course, that depends on the board and materials, but typically a work shift (8-12 hrs) is just fine. If you have a concern about a particular board, you need a balance good to micrograms and an oven so you can see the rate of moisture uptake. Wayne Thayer -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Datacom - Juliano Ribeiro Sent: Tuesday, July 22, 2014 12:32 PM To: [log in to unmask] Subject: [TN] PCB Shelf Life Hi, We are sourcing a table with the Maximum Time before reflow/wave that the bag need to opened according to surface finishes . For example: OSP, ENIG, HASL, HAL OSP=xx hours before reflow (maximum) ENIG=xx hours before reflow (maximum) .. .. .. Thank you _____________________________ Juliano Bettim Ribeiro DATACOM ENGENHARIA DE PROCESSOS Rua América Nº 1000 - Eldorado do Sul - RS CEP: 92990-000 +55 (51) 8446-2135 +55 (51) 3933-3000 Ramal: 3484 <mailto:[log in to unmask]> [log in to unmask] <http://www.datacom.ind.br/> www.datacom.ind.br ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________