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Aluminum is ideal for use as lithographic plate, PS plate and CTP plate because it is lightweight, flexible and easily recyclable.  The formability of aluminum makes it easy to give the plates or sheets the necessary surface roughness that is needed for the emulsion techniques.

Known as litho stock, the typical alloy used most often is 1050 grade aluminum.  1050 aluminum alloy is part of the commercially pure wrought family that forms the 1xxx series of alloys.  It normally gets formed through an extrusion or rolling process, usually the latter when creating lithographic sheets or plate.

In addition to the printing industry, 1050 is commonly found in electrical and chemical applications due to its high electrical conductivity, corrosion resistance and workability.  It is often used for heat sinks due to its excellent thermal conductivity.

Another benefit in using aluminum for your lithographic plates is that it can easily be recycled.  Printers will sometimes need to go through hundreds of sheets a day to fulfill their output needs; having a material like aluminum that can be reused not only makes environmental sense but helps to reduce costs as well.  It is necessary to wash off the excess ink as well as remove any tags that were used to identify the sheet prior to recycling.

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