If these are important to you, please message and we'll be happy to provide more detail on the case. For those unfamiliar with Newton Rings: This is an occasional effect produced by the inner and outer cases being in direct contact with one another. The visual effect is similar to oil on a water puddle because of the two plastics. Ultimately it is not anything that is in direct contact with your comic, nor will it affect the comic's condition over time. Please also leave us feedback upon receiving your item, this really helps us better server our customers.