Hi, Dave I am referring you to NTS. https://www.nts.com/services/testing/environmental/fungus/ They have a lot of knowledge in the subject and can probably answer your questions. I urge you to contact them for information. GD has used them before, and I can attest they are a bunch of fun guys! Odin -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of David Hillman Sent: Monday, April 09, 2018 5:04 PM To: [log in to unmask] Subject: [TN] A Fungus Nutrient Question Hi team! Looking for TechNet's sage wisdom. Some folks are familiar with this but many electronic modules have a "shall not be a fungus nutrient material" in terms of the components materials, laminate materials, etc. I was asked the question if "properly reflowed flux materials are classified as non-fungus nutrient supporting". Does anyone have an knowledge/data on properly reflowed flux residue being "non fungus nutrient supporting"? TIA Dave Hillman Rockwell Collins [log in to unmask]