17-08-2026, 03:00 AM
(16-08-2026, 11:45 PM)oshfdk wrote: You are not allowed to view links. Register or Login to view.I think taking either a UV image or a good close up with a modern phone may provide more information.I doubt it. It looks like the paint in that area has 100% coverage. To see whether there are ink strokes under the paint we would need some wavelength that can get through the blue pigment, which is probably azurite (copper carbonate). But I checked the images of You are not allowed to view links. Register or Login to view. in ultraviolet (365 UV), blue (450 RB), and infrared (940 IR), and in all of them the blue paint seems to be opaque and "black".
All the best, --stolfi