Paper that does not bleed - RENDR. I have not tested it with heavy blending yet but so far no bleeding. : r/copic

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Bee Paper Bleedproof Marker Pack, 8-1/2-Inch by 11

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Properties - Bianyo marker paper pad is available in two pad sizes; A4 (8.27” x 11.69”), and A3 (11.69X16.54). White, Ultra-Smooth, Acid-Free, PH

Bianyo Bleedproof Marker Paper Pad, A4(8.27X11.69), 50 Sheets, 18 LB / 70 GSM, Glue-Bound, 100% Cotton, White, Ideal for Use with Markers and Ink

I Like Markers: Alcohol Marker Papers

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【No Bleed & Heavyweight Marker Paper】Our marker papers are made by 120lbs (200gsm) heavyweight papers. It is bleed-proof for all the Alcohol Oil Water

FEITAKE Marker Paper Bleedproof for Alcohol Markers 60 Sheets / A4(8.3x11.7) / 120lb/200gsm Thick Art Crafting Finger Paint Papers for Kids Artists

Sketchbooks for Ink and (light) wash - Liz Steel : Liz Steel

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Test of different papers I have used with markers : r/copic

Fountain Pen Friendly Paper Collection by Yamamoto Paper: A Review