Sylvia Rose
Best Mortar & Pestles for Artists, Chefs, Scientists
The mortar and pestle as a unit is about 35,000 years old. With many varieties available today it's important to choose the best mortar...
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Sylvia Rose
Oct 15 min read
Chemistry of Rust: Minerals & Pigment Colors
Rust, the reddish-brown coating that forms on iron or steel due to exposure to oxygen and moisture is a fascinating display of chemistry....
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Sylvia Rose
Sep 294 min read
Hydrogen Peroxide: Chemistry, Production, Risks
Hydrogen Peroxide (H₂O₂) is one of the most versatile chemicals today due to powerful oxidizing properties and a wide range of...
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Sylvia Rose
Sep 295 min read
Magnetite: Ubiquitous Iron Ore with Soul
Magnetite is an iron ore formed below the earth's surface. As one of the primary iron ores it keeps the wheels of progress turning....
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Sylvia Rose
Sep 293 min read
Natural Iron Oxide Pigments: Extraction, Types & Colors
Iron oxides create beautiful pigments in colors from warm yellow and orange to deep reds, brown, black and even green. Besides industry...
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Sylvia Rose
Sep 273 min read
Steam Distilling Floral & Herbal Essential Oils
Distilling essential oil can be used for aromatherapy, in cuisine, beauty, healing or to set a mood. Here's the methodology to capture...
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Sylvia Rose
Sep 253 min read
Oil of Philosophers: Alchemy Health & Beauty
Oil of Brick is known as Oil of Philosophers by alchemists and Oleum de Lateribus (Oil on the Sides) by apothecaries. This medicinal and...
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Sylvia Rose
Sep 254 min read
Arcanum Joviale: Alchemy of Sudorific Sweat
Arcanum Joviale is an alchemy medicine made of metal salts, taken to induce sweating. While the term sudorific is introduced in 1626,...
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Sylvia Rose
Sep 247 min read
Acetic Acid: Vinegar 🜊 in Ancient Alchemy
Acetic acid is a compound with many uses. With chemical formula CH₃COOH, this colorless liquid has a sharp pungent smell and sour taste....
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Sylvia Rose
Sep 236 min read
Sapphire Gemstones: Colors, Myths, Origins & Gemology
Exquisite gems, sapphires are beautiful stones known for stunning colors and unique properties. Greeks wear sapphire for guidance when...
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Sylvia Rose
Sep 225 min read
Antimony (Stibnite, Kohl) Ancient Metal of Science & Beauty
Antimony (stibnite, Sb) is one of the elements known by the ancients, a primary source of black powder kajal or kohl. With its silvery...
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Sylvia Rose
Aug 246 min read
Herbal Remedies in Medieval Alchemy
Herbal remedies are ubiquitous in medieval alchemy, a practice combining elements of science, spirituality, and mysticism. Recipes are...
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Sylvia Rose
Jul 274 min read
Caterina Sforza: Renaissance Alchemy
Caterina Sforza (1463-1509) is a remarkable figure of the Italian Renaissance, leading a colorful and controversial life. Alchemy is...
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Sylvia Rose
Mar 103 min read
White Pigments of Ancient Artisans
White pigments used in ancient art, spirituality and beauty include bone, limestone variations like chalk and other natural sources....
41 views
Sylvia Rose
Mar 66 min read
Red Ocher (Ochre) Ancient Pigments
Red ocher is among the first colors appearing on the palette of early humans, along with white and red. Black, white and red are also...
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