any remaining grit and chemicals after being sufficiently washed the jeans may be sent to dryer 66 for conventional drying then folded and packaged for shipment back to the manufacturer during the tumbling operation the pumice rock will abrade against the jeans thereby giving the jeans the desired 34 worn 34 look while the potassium permanganate within the pumice rock is slowly released during this abrasive process to perform its desired bleaching effect on the jeans this tumbling action will cause the exterior layer of each pumice rock to become worn away so that the rock will decrease in size nevertheless since the rock has been fully impregnated with potassium permanganate the new layer continues to contain the desired quantity of liquid bleach to achieve its intended effect during the tumbling operation most of the grit or sand worn off the pumice rock will pass through perforations in the tumbler and may be discharged from the bottom of the tumbler and discarded a given quantity of pumice rock may typically be used for tumbling several 34 loads 34 of jeans after a period of time additional pumice rock may be added to the tumbler with a new batch of jeans as a feature of the present invention however the 34 used 34 pumice rock need not be reimpregnated and may be continually reused until its size is sufficient to allow it to.