| 摘要 |
The method involves passing a gauge block (12) through an open defects detecting installation, and applying a penetrating composition with an indicator substance to a block surface which is washed and dried. A composition with a developer is applied on the surface. The surface is illuminated to illuminate a remaining indicator substance. The block is subjected to preparatory treatment comprising immersion in a bath having an emulsifier, a rinse under pressure, drying, applying a developer at the location of the pattern, and another rinse under pressure, before passing through the installation. |
