This is the continuing history note from Mr. Gumbinner and the history of the B machine built in the Ashburton Ave. factory and probably the machine which made smooth anodized presensitized plate called LS 100
A
little later based on work done in an aluminum anodizing shop in
Mount Vernon, a second line the B line for treating the aluminum in
rolls up to 60 inches wide was ordered from Century. A hot tape
splicing section and later a two station
unwind stand was ordered from Deprieux in Germany. The anodizing
section was two four foot diameter rubber covered drums in a tank
with walls line for with lead water cooled pipes for cathodes.
Because of leak problems by difference of weight of drums when in an
empty tank and 16% sulfuric acid there were leak problems. So the
tanks were used half full. This was followed by a series
of tanks for rinsing and applying either a hot sodium silicate
solution or a potassium zirconium fluoride solution. This was
followed by a washing solution; then a deionized water rinse; then a
drier. After this the aluminum was coated either with squeeze rollers
or a photo sensitive solution made with the diazo precipitated with
MS-40 combined with polyvinyl formaldehyde and epoxy resin such
as epon 1004 or epon 1008.