A proper "repack" of the ASTM E155 porosity levels PDF should include:
If your repacked PDF has compressed JPEG artifacts or faded grayscale, you will under-call porosity (reject good parts) or over-call porosity (accept bad parts). Ensure your repack maintains 300+ DPI resolution for the radiograph plates. astm e155 porosity levels pdf repack
Use a light box (brightness > 3000 cd/m²). Place your radiograph next to the printed reference from the PDF (printed at true scale). Move through Levels 1 to 5 until the density and distribution match. A proper "repack" of the ASTM E155 porosity
