Xuan paper behaves differently from Western watercolor paper: it wicks moisture sideways instead of holding it on the surface. This article explains how absorbency changes wash, layering, and edge control, how light, medium, and heavy sizing map to different watercolor techniques, what supplier documents to request before buying, and how retailers and importers should stock grades by market.
Watercolor painters who come from cotton rag paper expect water to sit on the surface long enough to be moved, lifted, and pushed. Xuan paper does not work that way. It pulls moisture sideways into the sheet within seconds, and that single behavior changes what every technique does. For retailers and importers, the same behavior decides which grade belongs on which shelf.
Key takeaways
- Unsized xuan paper spreads water quickly and laterally, so wet-in-wet blending is fast and edges stay soft.
- Light, medium, and heavy fanji sizing change how long paint stays workable before it locks into the fiber.
- Grade choice follows technique: washes need the absorbent raw sheet, controlled detail work needs a sized sheet.
- Ask the supplier for per-batch bleed test records and per-sheet sizing uniformity records before committing to a grade.
- Stock mix should track the local market — calligraphy and ink buyers versus watercolor workshops pull in different directions.
On this page
How absorbent paper changes water behavior
"Rice paper" is a loose trade name; most of what is sold under it in art channels is xuan paper, a handmade sheet built from plant fiber. The defining property for a watercolor artist is not thickness but wicking speed. On a sized Western sheet, a wet brush leaves a bead that dries roughly where it was placed. On an unsized xuan sheet, that bead disappears into the fiber almost immediately and travels outward along the grain.
That difference has three practical consequences:
- Water arrives before pigment does. The fiber is already damp when the pigment settles, so the pigment follows the water rather than sitting on top of it.
- Edges form differently. A hard, crisp boundary requires the paint to stay in one place while it dries. Absorbent paper keeps moving it, so boundaries soften unless the surface is sized.
- Correction is limited. Once pigment is pulled into the fiber, lifting it back to white paper is much harder than on a coated or heavily sized sheet.
None of this is a defect. It is the reason ink painters and watercolor artists who want atmospheric, merged passages choose this paper. It is also the reason a painter who wants crisp architectural linework has to plan around it rather than fight it.
What changes in practice: washes, layering, and edges
Technique adjustments follow directly from wicking speed. The table below frames the shifts a painter moving from Western watercolor paper will notice first.
| Technique | On absorbent xuan | On typical surface-sized paper |
|---|---|---|
| Wet-in-wet blending | Very fast; colors merge within seconds | Slower; the painter controls the merge window |
| Wash edges | Soft, feathered, hard to hold sharp | Can be kept crisp with dry surface and timing |
| Layering | Each layer sinks in; re-wetting lifts previous layers | Layers build on top with less disturbance |
| Lifting / corrections | Restricted once pigment is absorbed | Easier while the surface is still damp |
| Linework and detail | Needs a sized sheet or very dry brush control | Standard practice |
Because water moves laterally, painters often work with a drier brush and less water in the mix than they would on a rag sheet. Some also pre-wet the paper and let it reach an even, matte-damp state before laying color, since an unevenly damp sheet will show uneven absorption.
Sizing levels and the techniques they map to
If a market wants both atmospheric washes and controlled detail, the answer is not one paper but a sized range. Treated xuan paper is manufactured with fanji sizing, and the line we produce is graded light, medium, and heavy. The grade changes how long the paint stays workable and how much of it penetrates the fiber.
| Grade | Surface behavior | Techniques it suits |
|---|---|---|
| Raw (unsized) | Fast, strong absorption; edges spread | Expressive washes, wet-in-wet, ink-style work |
| Light sizing | Slower absorption; some edge control | Loose watercolor with defined shapes |
| Medium sizing | Balanced; paint holds long enough to shape | General watercolor, glazing with moderate correction |
| Heavy sizing | Smooth surface; limited penetration | Detail work, fine linework, controlled edges |
Two product lines cover this range. Raw Xuan Paper Professional (GMO-XP-001) is the absorbent line, supplied with a bleed test performed per batch and custom sizes from 50×100 cm to 97×180 cm. Treated Xuan Paper for Gongbi (GMO-XP-002) carries the fanji sizing range, with sizing uniformity tested per sheet and a surface smoothness test. Both carry an MOQ of 200.
The sizing grade is not a quality ranking. A heavy-sized sheet is not "better" than a raw one; it simply holds paint longer. A stockist who carries only one grade will turn away roughly half the technique range.
What to verify with your supplier
Because the grade names are not standardized across mills, the label on the wrapper is a weak guide. Two suppliers can both say "medium sizing" and deliver sheets that behave differently. The reliable path is documentation tied to the batch.
- Bleed test records per batch for the raw absorbent line — this is the document that shows how far and how fast a standardized water drop spreads on that batch, rather than a verbal description of absorbency.
- Per-sheet sizing uniformity records for the treated line — uneven sizing is the most common complaint in watercolor use, because a sheet that absorbs faster in one corner produces streaks that cannot be corrected afterward.
- Surface smoothness records for sized grades, since heavy sizing is the grade most often used for detail work where a rough surface interferes with fine marks.
- Size range confirmation if the market needs large-format sheets — the raw line supports custom sizes from 50×100 cm to 97×180 cm, which matters for workshop programs and for artists working full-sheet.
Before placing a volume order, request a sample from the specific grade and batch you intend to stock, and test it with the technique the end buyer will actually use. A wash test and a linework test on the same sheet will separate a light grade from a heavy one faster than any description.
Stocking logic by market
Demand for this paper splits along technique lines, and those lines differ by market. A buyer whose customer base is largely calligraphy, ink study, and Chinese painting will see most volume in the absorbent raw line. A buyer serving Western-trained watercolor artists and workshop programs tends to need the sized range, because those painters expect a longer working window and more edge control.
A practical first stock for a general art supply retailer:
- Raw absorbent sheets as the volume mover in markets with an established ink-painting customer base.
- Medium and heavy sized sheets in smaller quantities as the detail and watercolor option, since these buyers are more technique-specific and will ask for the grade by behavior.
- A sample pack spanning grades so staff and customers can compare absorption directly, which reduces returns from buyers who assumed all xuan paper behaves the same.
For stationery importers adding the category, the decision point is usually MOQ against shelf turns. With an MOQ of 200 per line, the sensible first order is the single grade that matches the dominant local technique, plus a sample pack, rather than splitting a thin quantity across the full sizing range.
FAQ
Is xuan paper the same as rice paper?
"Rice paper" is a trade term used loosely in retail, and most art paper sold under it is xuan paper made from plant fiber. Because the name is not standardized, the grade and sizing behavior matter more than the label.
Can I use xuan paper for regular watercolor painting?
Yes, and the technique changes. Expect faster wet-in-wet blending, softer edges, and less ability to lift paint back to white. For controlled edges and fine detail, choose a medium or heavy sized sheet rather than the raw absorbent grade.
Which sizing grade should I stock?
It depends on the local customer. Markets weighted toward ink and expressive work move raw absorbent paper; markets weighted toward watercolor and workshop teaching move the sized grades. Carrying at least one grade from each side of the range covers more technique needs than stocking two absorbency levels that behave similarly.
How do I confirm the grade before ordering?
Request per-batch bleed test records for the absorbent line, or per-sheet sizing uniformity and surface smoothness records for the treated line, then test a sample of that batch with your end customer's technique. Grade names alone do not carry across mills.
Product specifications referenced in this article: Raw Xuan Paper Professional (GMO-XP-001) and Treated Xuan Paper for Gongbi (GMO-XP-002). Both have an MOQ of 200. Custom sizes on the raw absorbent line run from 50×100 cm to 97×180 cm.