Method for making visible defects in surfaces

Details Method for making visible defects in surfaces Method for making visible defects in surfaces

1975-08-19

1976-12-07

Queisser, Richard C.

Measuring and testing

Surface and cutting edge testing

25230119, 252408, G01N 1908

Patent

active

039954838

ABSTRACT:
A method and a device for making visible defects in surfaces, in particular hot surfaces, by applying to the surface a penetrating liquid comprising a dye that soaks in the defects, removing the excess of liquid, applying on to the surface a developer such as a synthetic resin, which, after the dye from the defects has migrated into the former, is cured by the heat content of the surfaces into a replica of the surface in which the reversed image of the defects has been recorded and a replica made according to the method.

REFERENCES:
patent: 2806959 (1957-09-01), De Forest et al.
patent: 3184596 (1965-05-01), Alburger
patent: 3279243 (1966-10-01), Molina
patent: 3715227 (1973-02-01), Alburger

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