Chalk (calcium carbonate)

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Chalk (Calcium Carbonate)

Traditional dyeing assist, used for centuries to adjust pH and brighten colors in natural dye baths. Chalk is especially helpful when working with madder, cochineal, and other reds and pinks that respond well to a slightly alkaline environment. It can also be used to balance overly acidic dye baths.

Chemical name: Calcium carbonate
Formula: CaCO₃
CI Name: Pigment White 18
CAS No.: 471-34-1

Materials & Care

Storage: Keep sealed in a cool, dry place.
Safety: Non-toxic, but fine powder may irritate lungs. Avoid inhalation.
Use: External use only. Not for food, drug, or cosmetic use. Keep out of reach of children.

Instructions for Use

Add 1–2 teaspoons per liter of dye bath when working with madder or cochineal to improve clarity and brightness of color.
Calcium carbonate be used to neutralize excess acidity in dye baths or water.
Always dissolve in a small amount of warm water before adding to the pot for best distribution.

General Product Safety

This product complies with EU GPSR requirements for safe handling of raw materials intended for craft and textile use.

For external use only. Not edible.
Keep away from children and pets.
Wear gloves and mask when handling powders.
Avoid inhalation of dust and contact with eyes.

Store in a cool, dry place away from direct sunlight. Reseal tightly after use.

Naturally derived and carefully processed from trusted sources to ensure safe use in dyeing and textile applications.

This product complies with the General Product Safety Regulation (EU) 2023/988 (GPSR).

Packed and distributed by The Natural Dye Store, Derech Hamaccabim 58, Rishon LeZion, Israel,Contact person Suzanne Tamar Dekel, +972525410033