Medium cleaning is done using Washing Soda or Lectric Soda (Sodium Carbonate) depending upon which term is used in your locale.
Great care should be taken during the application as well as for determine its strength.
A pinch of soda crystals is dissolved in a cup or saucer with hand warm water, stirring until all crystals are dissolved.
Using a ball of cottonwool dipped in the solution, a corner of the painting is wetted for trial.
Rubbing the area with the cottonwool in circular motion the effect is noted.
If there is little or no effect, another pinch is added to the solution as before and another trial is made.
Rinse the painting thoroughly, using a soft sponge, to remove all traces of the soda, as it will leave white marks on the painting. You'll be pleasantly surprised by the regained color depth of the painting. |
