Christ Blessing the Children
Jan Salomonsz de Bray, 1663
At the end of the eighteenth century De Bray’s 'Christ Blessing the Children: Family Portrait Braems-Van der Laen' was displayed in the city hall of Haarlem, where it was exposed to high humidities. The entire painting suffers from extensive lead soap aggregate formation. The areas in front of the stretcher bars however, are clearly affected most: the protrusions are larger and more numerous.
A comparison of the degradation state of the lead soap affected areas by lead soap formation will allow for an evaluation of the role of high humidities in the formation of lead soap protrusions.