Ansel Adams preferred using Wratten gel filters by Kodak. He stated in his earlier Camera book that they have very little optical affect (aside from their color influence), but that they can be a bit reflective.

I would suspect that the best filters are B&W multi-coated glass filters, as they would be the least reflective and transmit the most light. But for non-reflective situations, I'm wondering how the Wratten gel filters would compare?

And, how would Wratten gels perform compared to "B" quality filters made by Tiffen, etc?

In terms of their optical quality, acrylic filters, like those made by Lee, etc., are a mystery to me. How do they compare to either gel or glass filters?

Your insights would be appreciated. I have a ton of filters, and I'm interested in paring them down to the few that I need for black and white film.