41 The Annunciation retable Protruding from the bottom border of the painting, they are to be used for lifting the painting in future demounting processes. To optimise the handling of the painting, four additional webbing-belt grip handles were screwed to the main vertical bars of the stretcher. This invisible system serves both as a means of holding the painting in place as well as a means to withdraw it from the retable with only four people (Fig.65). Once the bottom of the painting is released from the position on the predella, the painting can slide down the sliding rails. The sliding dowels at the top of the painting will pass through the openings in the sliding rails after 25 cm and the painting can then be lowered down.42 Fig. 65: Schematic diagram of the disassembling sequence
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