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Optical Brighteners: Paper

When we think of paper, especially historical paper, we tend to think of white paper.  We think of the fine white paper used for books, or for letters or manuscript … Read More

Dyebath Acidity and Litmus

Many organic dyes, what the eighteenth-century colour-makers called “vegetable” colors, are sensitive to the alkalinity or acidity of the dyebath.  I have elsewhere shared the range of bright reds and … Read More

The Lab Acquires a Motley Emblem

I’ve been targeting a first-edition copy of Tristram Shandy just about since this project began.  I’m not a bibliophile.  This isn’t about author-love or the commoditization of old things.  I … Read More

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