Additional memo from Mr. Gumbinner 13 smooth plates

 In order to make so called smooth plates we installed a caustic etch tank rinse and de smut and rinse tank over the graining section.  At some point Brushes were added to brush the bottom side of the plates.  The aluminum from either the brush or chemically etch section was passed around a copper clad roller to make electrical contact, we later put carbon brush contractors on the aluminum.  Since aluminum does not plate we were able to place aluminum bars above and below the aluminum sheet from the roll.    This was followed by the interlayer solution and then the light sensitive diazo coating.