This is the first I’ve seen these lovely 19th century trade cards. They beautifully advertise “cures” for human ailments. They were so beautifully rendered they were cherished and saved in scrapbooks.

https://hyperallergic.com/384332/the-false-advertising-of-sophistically-decorated-19th-century-pharmaceutical-trade-cards/

Paper collectible are best kept stored in sleeves and acid-free boxes to protect them and safeguard their longevity. Use  archival sleeves and boxes for that.
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