How do I identify hand colouring?

Examining the surface under magnification reveals small pooling effects and slight brush irregularities where pigment sits on the paper fibres. Printed colour, by contrast, breaks down into minute dots or solid mechanical screens. Hand-applied tints often display subtle variations in tone from one impression to the next, whereas mass-produced chromolithography repeats identical colour boundaries across every sheet.

Are these prints contemporary to their dates?

Most listings date from the actual period of creation, spanning the seventeenth through the early twentieth centuries. Original printing plates were inked and pressed during the stated era. Publishing dates marked on maps or book illustrations generally confirm the primary manufacturing window, though subsequent restrikes do occur in certain categories.

How should I frame and display them?

Paper requires protection from direct sunlight and high humidity to prevent fading and foxing spots. Acid-free mounts and backing boards prevent chemical degradation over time. Displaying works away from direct heat sources and using UV-filtering glass helps preserve both the paper support and the fugitive watercolour pigments.

What causes spots on antique paper?

Foxing appears as brownish-red spots caused by chemical reactions between iron impurities in the paper and ambient moisture. It remains a common characteristic of vintage wood-pulp and rag sheets. While light foxing indicates genuine age, heavy staining can obscure the printed image and warrants careful professional conservation.