Time: It is not recommended that any art, especially thin cardboard stock be displayed for longer than three months a year to maintain quality.
I'm still kinda new to this...could you explain why time, in the absence of UV light, moisture and air born pollutants will ruin my cards?
... never realized those desiccant silica packs actively absorbed air-born pollution, I always thought they just absorbed water vapor and lowered humidity.
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