Jun 19, 2012, 05:30 AM
Help! Tumbled coins turned black/dull
Been using the rock tumbler/aquarium gravel/dish soap method of cleaning coins. I separate out the clad and the copper and clean them separately from one another. My question is this, the first batch of clad I cleaned came out silver colored and shiny. Subsequent batches are coming out dull gray/black. Pennies are coming out black (separate from clad). I use plain Dawn dish washing liquid (no bleach and not anti-bacterial), natural rock gravel and warm water. Dirt and crud coming off, but coins look awful. Could I be overloading tumbler? Any suggestions on how to avoid this in the future? Will those coins clean up better if I run them again? Thanks for your help.
Jun 19, 2012 05:30 AM
Jun 26, 2012, 06:44 PM
I deal in reality
Try laundry detergent. It is made to cut dirt" water base" , Dish washing soap is made to cut grease. Also use fresh gravel each time.
Jul 02, 2012, 05:53 AM
Thanks. Will try this on the next batch.