Just wondering if anyone has done trials on how long you can leave paste (tin-lead or pb free) on a board after you have printed it before it starts going 'off'?
FYI - have searched and found the 'pasting ahead' thread - just wondering if anyone went away and had a good look? They paste them here at this company (just joined this week) and they leave them on the shelf (room temperature, uncontrolled room, not even a clearoom!) for x amount of time. That x seem to vary, but it's over hours. and hours.
Been out of the industry for a while, so just wondering if it was just me thinking these people are crazy or if there had been some advances.
If it helps i can find out paste type.