Is it true that dye penetration is unreliable for packages using Tyvek?
No, this is not true; however it takes special care and training to identify the difference between a true channel leak versus a permeation of dye fluid through the Tyvek. If a channel leak is present, the dye will migrate through in a matter of seconds. If the dye is allowed to be in contact with an area of Tyvek for too much time, it will permeate through. The usual length of time to allow the dye to be in contact with a seal is about 10 seconds.
