The official ASTM E125 document provides specific "degrees" of severity (1 through 5) for each type of flaw. Having the high-fidelity original is the only way to ensure your casting meets the specific safety "Grade" required by your client or regulatory body. Conclusion
To ensure you are using the most current, high-resolution references for your inspections, you should obtain the standard through official channels: astm e125 reference photographs pdf free download
In the field of NDT, accuracy is everything. Using a grainy, third-generation photocopy of a reference photograph can lead to (rejecting a perfectly good part) or, more dangerously, false negatives (allowing a defective part to enter service). The official ASTM E125 document provides specific "degrees"