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Efflorescence on the outside wall of a sedimentation tank (B150) (A); Stereomicroscopic images of a brick sample (sample B5) with visible symptoms of salt efflorescence on the surface (B); Detachment of paint coating due to salt efflorescence on the wall of a 19th century building (C); Stereomicroscopic images of paint-coated plaster (sample P1) with visible symptoms of salt efflorescence on the surface (D).
