Paper and foil materials change shape based on environmental conditions.
Humidity Problems
warping
foil oxidation
surface stickiness
micro-swelling
mold risk
Dryness Problems
cracking
brittleness
corner flaking
edge fiber exposure
Temperature Problems
bending from heat
foil separation
adhesive softening
ink discoloration
AGS Measurement
AGS laser systems detect:
warp curvature
foil lift
microscopic bending
Tips:
Store cards around 68–72°F
Humidity 40–55%
Avoid direct sunlight
Avoid basements/garages
Environmental care significantly influences grading outcomes.