Additional memo from Mr. Gumbinner 12 Anodized plate

I brought some chemically etched sheets to a company in Mount Vernon that did anodizing.  After they were anodized we put them through the silicate and coated them with the diazo.  They produced many more copies than the plates that were not anodized.  Therefore when Century Engineering built the next six brush line to process rolls of aluminum  after the brushing section we installed two deep tanks which had lead pipe lining connected to an anodizer cabinet.  There were 4 foot rubber covered rolls in each tank and a copper clad roll to complete the circuit.  While this worked well, there was considerable leakage of the sulfuric acid solution so we could only use the bottom half of the tanks.  About a year later we had Century Engineering build a third line.