Plaster dust is calcium sulphate, which you commonly find in construction areas or in parts of the home where plaster walling was installed or renewed. Unfortunately, plaster dust can be hazardous to the health. It can cause eye irritation and even serious respiratory problems if inhaled. With the proper cleaning techniques, you can safely remove plaster dust.
Mix together a gallon of hot water with 1 tbsp of oil. Cooking oil, linseed oil, WD-40 or mineral oil are all suitable choices for this procedure.
Soak a heavy-duty sponge into the water and oil solution, then ring it out completely.
Wipe down any area of your home that is covered with plaster dust. If you have a heavy coating of plaster dust, clean out your sponge in the water and oil solution and wipe down the area again to make sure that the plaster dust is completely gone.
Use a vacuum equipped with a HEPA filter to remove plaster dust on furniture. Don't wet furniture with the water and oil solution. Make sure to throw the vacuum bag away after you have finished vacuuming all the plaster dust.
Don't attempt to remove plaster dust without first putting on a protective mask and eyewear. You don't want to inhale plaster dust, as it could cause respiratory problems.