I just signed up for this site and also am way beginner in dag-making. Would be interested in the 4×5 plates though – unused especially, but would like to know how many microns are on there and also how many times you used the ‘used’ 4×5 plates too.
So I got these second hand sometime ago. Unfortunately I don’t recall what Mark told me as far as the coating thickness. Other plates in period sizes that I have used from him have provided several images before subsequent buffing started showing copper on the edges.
Hope this is helpful. Please feel free to contact me directly todd(at)minieball69(dot)com