Method for making lithoplate

Details Method for making lithoplate Method for making lithoplate

1988-10-19

1990-02-20

Dean, R.

Metal treatment

Compositions

Heat treating

148 115A, 148439, 148440, C22F 104

Patent

active

049023535

ABSTRACT:
An improved method of making a lithoplate from a 5XXX type alloy which includes controlling the composition and casting practices to eliminate forming a pine tree metal structure in an ingot used for rolling a workpiece to be made into lithoplate. The method also includes homogenizing and hot rolling the ingot at a controlled initial temperature to produce a desired grain and metal microstructure in the sheet rolled from the ingot which is suited for providing a surface having substantially uniform and evenly distributed craters produced by an electrochemical method of graining.

REFERENCES:
patent: 4818300 (1989-04-01), Rooy et al.

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