Craft · 6 pages · 12 min

How watercolor paper is sized

Size is a glue or a chemical treatment that slows water so a wash can sit and be moved.

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From the opening

Sizing is a substance put into or onto paper so water does not soak straight through the fibers. On watercolor paper it keeps a wash on the surface long enough to be pushed, lifted, and layered instead of vanishing like a stain on a blotter. The opening covers internal size treats the pulp, gelatin sizes the surface, and washes stay movable briefly.

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Inside

Internal size treats the pulp
Gelatin sizes the surface
Washes stay movable briefly
No size acts as blotter
Where the idea stops applying
A distinction worth keeping

Sources

Gelatin tub sizing of rag paper
Internal sizing of paper pulp

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How watercolor paper is sized

From the opening

Inside

Sources

Also on the desk