Fig. 2
Description of the painting sample: a The boards are used as support, b applying glue with a soft brush, c adding the first Teflon insert (defect 1), d using a soft brush and applying glue on the linen canvas, e drying the linen canvas layer, f adding the second Teflon insert (defect 2), g applying plaster and glue, h sanding the plaster layer, i adding the third Teflon insert (defect 3), j sanding the second plaster layer, k outlying the figure, l the positioning of the gold leaf, m using a damp cotton ball to adhere the gold leaf, n painting different pigments for sample A and sample B, and o drying of the final samples. (The fabrication of the samples is completed.)