{"product_id":"chalk-pigment-430334025","title":"Chalk Pigment","description":"\u003cp\u003eChalk is a natural mineral pigment and gesso made from finely ground calcium carbonate. It produces a soft white to warm off-white powder with a gentle, matte, earthy character. Unlike powerful modern whites such as titanium white, Chalk has low tinting strength and modest covering power. Its value lies in its softness, body, absorbency, and ability to modify the texture and handling of paints.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eIn use, Chalk gives a smooth, velvety surface and a naturally matte finish. It can be used to soften strong colors, add body, reduce gloss, increase opacity slightly, and create pale mineral tints. In watercolor and gouache, it can create a soft, opaque, fresco-like quality. In tempera, casein, and acrylic, it adds body and a dry mineral surface. In oil, it may be used carefully as an extender or bodying material, though high amounts can make paint lean, stiff, or overly absorbent.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eChalk is especially important for traditional grounds and preparatory layers. It is a classic material for gesso, panel painting grounds, drawing grounds, pastel grounds, distemper, lime-based painting, and historical wall painting. Its quiet white color and fine mineral texture make it useful for artists seeking subtle natural whites, historical paint handling, and traditional surface preparation.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eHistory\u003c\/p\u003e\u003cp\u003eChalk has been used since antiquity as a white pigment, drawing material, filler, and ground material. It occurs naturally as a soft sedimentary form of calcium carbonate, formed from the remains of microscopic marine organisms. Because it is soft, pale, abundant, and easy to grind, it became one of the most widely used mineral materials in European painting and craft traditions.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eIn medieval and Renaissance workshops, Chalk was essential for preparing painting grounds. Mixed with animal glue, it formed traditional gesso grounds for panel paintings, manuscript covers, gilding preparation, and decorative objects. These chalk grounds provided a smooth, absorbent, bright surface that allowed paint and gilding to sit cleanly above the support.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eChalk was also used in distemper, fresco-related work, drawing, underdrawing, and as an extender in paints. While it lacked the brilliance and opacity of lead white, it was valued for its body, economy, stability, and compatibility with many traditional binders. It helped artists control surface, absorbency, and texture rather than simply providing color.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eToday, Chalk remains important for artists, conservators, icon painters, gilders, pastel makers, and anyone working with traditional grounds or historical paint systems. It is not a dramatic pigment, but it is one of the foundational materials of painting history.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePigment Information\u003c\/p\u003e\u003cp\u003ePigment Type: Natural Mineral Pigment \/ gesso\u003c\/p\u003e\u003cp\u003eChemical Composition: Calcium Carbonate, CaCO3\u003c\/p\u003e\u003cp\u003eSuitable Mediums: Watercolor, Gouache, Tempera, Fresco, Casein, Acrylic, Oil with caution, Distemper, Grounds\u003c\/p\u003e\u003cp\u003eLightfastness: Excellent\u003c\/p\u003e\u003cp\u003eOpacity: Low to Semi-Opaque depending on particle size and concentration\u003c\/p\u003e\u003cp\u003eOther Names: Whiting, Calcium Carbonate, Natural Chalk, Chalk White, Blanc de Meudon, Spanish White\u003c\/p\u003e\u003cp\u003eColor Index Code: PW18\u003c\/p\u003e","brand":"Morrow Archival","offers":[{"title":"5 Grams","offer_id":48278697378014,"sku":"PE-033-0000-005g","price":6.0,"currency_code":"USD","in_stock":true},{"title":"100 Grams","offer_id":48278697410782,"sku":"PE-033-0000-0100g","price":14.0,"currency_code":"USD","in_stock":true},{"title":"300 Grams","offer_id":48278697443550,"sku":"PE-033-0000-0300g","price":34.0,"currency_code":"USD","in_stock":true},{"title":"500 Grams","offer_id":48278697476318,"sku":"PE-033-0000-0500g","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/2821\/2702\/files\/fb7dee04-5fe1-49df-ad2d-485f5eeebbe6-copy.jpg?v=1779560567","url":"https:\/\/morrowarchival.com\/products\/chalk-pigment-430334025","provider":"Morrow Archival","version":"1.0","type":"link"}