Mating a clean ferrule end-face to a contaminated ferrule end-face can only result in two contaminated end-faces, and a very good chance of permanently damaging / scarring the smooth glass end-face of both.   Cleanliness, as we know, counts.  Luckily we have a library on clean fiber connections that include:

Additional resources from the FOC team include:

Have questions about this FOC Tip?

Contact FOC with questions at: (800) 473-4237 / 508-992-6464 or email: and we will respond ASAP.