Bubble hash, also known as ice water hash, is a type of cannabis concentrate made through a process of cold-water extraction. It is called "bubble hash" because of the way it bubbles when exposed to heat or flame. Bubble hash is highly regarded for its purity and potent cannabinoid content.

The production of bubble hash involves using ice-cold water and agitation to separate the resin glands, or trichomes, from the cannabis plant material. Here's a general overview of the process:

1. Material Preparation: The cannabis plant material, usually trimmings or small buds, is first frozen to a very low temperature. This helps preserve the integrity of the trichomes during the extraction process.
2. Ice Water Extraction: The frozen plant material is then mixed with ice-cold water in a vessel. The mixture is stirred or agitated, causing the trichomes to separate from the plant material and sink to the bottom.
3. Filtration and Collection: The mixture is poured through a series of screens or filter bags with varying pore sizes. These screens or bags act as filters, allowing only the trichomes to pass through while trapping larger plant material. The collected trichomes, which settle at the bottom of the collection vessel, form a moist, sandy material.
4. Drying and Curing: The collected trichomes are then carefully dried and cured to remove excess moisture and enhance the quality and texture of the final product. This may involve techniques such as air-drying or pressing the hash into blocks or other shapes.

Bubble hash is often consumed by smoking or vaporizing. It can be crumbled or heated and mixed with cannabis flower for smoking, or used in specialized hash pipes or vaporizers. Due to its high potency and purity, bubble hash can produce strong and flavorful effects.

Bubble hash is prized for its full-spectrum profile, meaning it contains a range of cannabinoids, terpenes, and other compounds found in the trichomes of the cannabis plant. This can contribute to a more robust and complex flavor and potentially enhance the entourage effect-the synergistic interaction of various compounds working together to produce therapeutic benefits.