Pumice, Rottenstone and Tripoli
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Welcome! / Forums / General Woodworking Discussions / Finishing / Pumice, Rottenstone and Tripoli
I have been trying to find information on the difference between rottenstone and tripoli in powder form, and have not had any success as of yet.
I purchased a pound of rottenstone made by Behlen that has tripoli in parenthesis on the label. Some sources say that there are three grades of powdered limestone: Pumice (2f and 4f), rottenstone and tripoli. Other sources claim that pumice is made from volcanic ash and rottenstone is made from slate and that tripoli is just another name for rottenstone. Still other sources say that pumice is made from limestone, rottenstone is made from volcanic ash and tripoli is a finer form of rottenstone.
Can anyone clarify this for me?