In Progress: Map of Maryland and Delaware 68.820

Laid paper on a cardboard backing; black printing ink; watercolor in red, blue, green, tan.

Published in 1795, 18.375"x15.1875"

Condition: Paper and backing discolored, brittle; water damage in UR and UL corners accompanied by a powdery deposit; foxing; small holes along left margin from previous binding; possible silverfish damage; mild surface dirt, small dent in UL corner; watercolor faded; red is lead-based and showing cracking.

Treatment:

Dry cleaning

Soak backing in distilled water & remove mechanically

Blotter wash in distilled water w/ a reservoir

Blotter wash w/ 1.5% peroxide

Backing - Very Acidic

Backing Removal...





Backing Removed, Pre-Washing

Blotter Washing

Dirt Pouring Out

Dirty Water, Round 2 

Post-Washing, Verso

Post-Washing, Recto

Solubility testing of pigments