hmm intresting thought!!! I think that it inhibits rather than kills bacteria's and moulds, resulting in a cleaner, and then less smelly nappy also due to its deodorising abilities and the obvious lack of dwelling bacteria. Maybe because of that your much less likely to get sore bums as a result of bacteria, but not less likely due to any PH change on the surface when urine and poo are present. I use a silver thing a few times day, because its antimicrobial, which i think lies the difference, it kills on contact and inhibits growth too. I know you can get silver impregnated sheets. Its being used in alot of fabrics now .. maybe silver woven into bamboo fabric will be our *thing* in a few yrs time!
Silk is also good for sore bums.. .. silver in silk.. woiuld be even shinier!!
£££££££££££££££! i bet too!!