Stabilized Solid Seasoning Composition, Griffith & Hall, Patent No. 1,994,572
The patent by Carroll L. Griffith and Lloyd Hall (a pioneer in food chemistry from Chicago) describes a Stabilized Solid Seasoning Composition (Patent No. 1,994,572), granted on March 19, 1935. This invention is a chemically buffered flavoring system designed to protect the natural pigments of spices—specifically the red-orange color of capsicum (peppers)—from the corrosive bleaching action of table salt, ensuring long-term color stability in commercial spice blends.
The “Why”
In the 1930s, spice manufacturers faced a significant commercial hurdle: capsicum extracts (oleo-resins) were highly prone to oxidation when in contact with salt. This reaction turned vibrant red seasonings into an unappetizing mottled grey or white within weeks. Hall discovered the “acidic trigger”—oxidation in the capsicum created acids that, when paired with chloride salts, acted as a bleaching agent. He sought to create a chemical buffer that could absorb this acidity without altering the flavor profile of the seasoning.
Inventor Section: Lloyd A. Hall
Lloyd A. Hall’s engineering philosophy was rooted in molecular stabilization. As one of the most prolific Black chemists in American history, Hall viewed food processing as a strictly controlled chemical environment. Operating in a time when food spoilage was a major public health and economic risk, Hall prioritized the mathematical precision of pH levels and antioxidant properties. His work at Griffith Laboratories turned food seasoning from a “culinary art” into a rigorous branch of chemical engineering, eventually securing over 100 patents that defined modern food preservation.
Key Systems Section
1. The Organic Buffer System
- Function: Neutralizes acidity to prevent the formation of bleaching agents.
- Modern Translation: pH Buffering / Conjugate Base Stabilization.
- Hall utilized salts of strong bases and weak organic acids (specifically Sodium Citrate and Sodium Tartrate). These salts act as chemical “sponges” that soak up hydrogen ions ($H^+$) formed by oxidation, preventing the acidity from reaching levels that trigger the bleaching of capsicum.
2. Microcrystalline Sodium Chloride Vehicle
- Function: Increases surface area for maximum flavor distribution.
- Modern Translation: High-Surface Area Powder Carrier.
- By using a “flash evaporation” process on hot drums ($285^\circ\text{F}$ to $300^\circ\text{F}$), Hall transformed standard salt into a fine, flaky powder. This “microscopically crystalline” form provides a high specific surface area to hold liquid oils and oleo-resins without the liquid settling or leaking.
3. Fixative and Protective Emulsion
- Function: Locks volatile aromatic oils into the solid base.
- Modern Translation: Volatility Control / Fixative Agent.
- Ingredients like Glycerin or corn sugar are mixed in to act as fixatives. These prevent the “essential oils” (clove, cassia, nutmeg) from evaporating, ensuring the seasoning retains its full aromatic strength over months of storage.
4. Oxidation-Resistant Flavor Complex
- Function: Stabilizes the reactive groups of essential spice oils.
- Modern Translation: Chemical Complexation.
- Spices like cassia (cinnamic aldehyde) and cloves (eugenol) contain reactive chemical groups. Hall’s formulation manages these groups (aldehydes, phenols, ketones) so they do not contribute to the oxidative breakdown of the red pigments.
Comparison Table
| Feature | Unstabilized Seasoning | Hall’s Buffered Composition |
| Color Lifespan | Visible bleaching in ~3 weeks. | Stable color for several months. |
| Acidity Control | Acid accumulates, triggering bleach. | Sodium Citrate buffers acidity to safe levels. |
| Crystal Structure | Hard, ground granules (Low surface). | Flaky micro-crystals (High surface). |
| Fixative Action | Rapid loss of volatile aromas. | Glycerin “locks” oils into the crystal. |
Significance Section
- Pioneering Food Chemistry: This patent helped establish the use of citrates and tartrates as standard stabilizing agents in the food industry.
- Economic Impact: By preventing “mottling” and bleaching, Hall saved meat processors millions in wasted product and customer complaints.
- Scientific Advancements: The use of “flash evaporation” for salt production influenced the development of modern powdered food and pharmaceutical carriers.
- Preservation Legacy: Hall’s focus on the chemical interaction between salt and antioxidants laid the groundwork for modern shelf-life extension in packaged foods.
