What factors influence the condition grading of a Superman comic book 1st edition?

Condition grading is based on a comprehensive assessment of the comic's physical state. Key factors include the cover (color, creases, tears, stains), spine (creases, chipping), pages (creases, tears, foxing, stains, writing), and overall presence of flaws. Grading scales typically range from Mint (near perfect) to Very Poor (severely damaged). Professional grading by companies like CGC or PGX is highly recommended for accurate assessment.