Based On Simon's reply I wonder where Howard Bond got his information or has he simply seen something on the surface of Ilford films that he believes will prevent Newton's Rings?

Did he qualify his statement in any way with potential elements of doubt as it sounds quite unequivocal to me as quoted.

To state a personal conclusion based on what you see and how you think that will decrease the incidence of Newton's Rings is one thing but stated as it apparently was seems to give his conclusion more foundation that it appears to deserve, based on Ilford's stated position .

pentaxuser