Test data shows the Aramid material is one of the type materials that picks up moisture that needs to be removed before assembly operations where the board sees temperatures where water is converted to steam. Steam occupies much more volume than water and this causes blistering, delamination and other not nice effects on the PWB ---------- From: [log in to unmask] To: [log in to unmask] Subject: ASSY: Aramid material and baking Date: Thursday, June 20, 1996 2:22PM Please forgive my ignorance, but what are the undesirable effects from not baking Aramid material prior to assembly? [log in to unmask]