An angular waste material from coal burning power stations available in 4 different grade sizes for the removal of a variety of carbon and other unwanted matter.
- Micron Sizes available are 80, 180, 250, & 500
- Mohs Hardness 6.5 (the same for all grade sizes)
- Colour Brown/Black
Available in 25kg bags & tonne pallets (40x25kgs)
250 is the most used for general removal of heavy/high density carbons, 500 for heavy work such as old paints on robust substrates whereas 80 & 180 are perfect for more sensitive conservation cleaning particularly with smaller nozzles and the Torc Studio System.
Unil is the hardest of the Stonehealth Approved Materials and is free of all known carcinogens and contains no more than 1% free silica so is considered safe for man and the environment although dry airborne particles must be treated as nuisance dusts see M.S.D.S regarding occupational exposure limits.