Conservation image Lime Mortars and Plasters (1998–2009)
A project of the Getty Conservation Institute
 

The nopal cactus (Opuntia ficus indica). The water extract of the nopal cactus is a common ingredient of plasters in the Southwestern United States. It is added to the slaking water to make slaked lime putty, or to the water to make the putty with hydrated lime. Photo: Eric Hansen.