# Sovereignty Module: Open the Form

## Complete Bowl Throwing: From Centering to Functional Vessel

The bowl is pottery's most fundamental form, requiring mastery of opening, pulling, and shaping. This campaign covers bowl profiles, throwing techniques, trimming, and functional design.

### Chapter 1: Bowl Types

| Type | Profile | Diameter | Depth | Use |
|---|---|---|---|---|
| Rice bowl | Steep sides, small foot | 4-5 inches | 2.5-3 inches | Individual rice serving |
| Soup bowl | Wide, moderate depth | 6-7 inches | 3-3.5 inches | Soup, stew |
| Cereal bowl | Wide, shallow | 6-7 inches | 2.5-3 inches | Cereal, salad |
| Serving bowl | Wide, deep | 9-12 inches | 4-5 inches | Table serving |
| Mixing bowl | Very wide, deep | 10-14 inches | 5-7 inches | Kitchen mixing |
| Pasta bowl | Wide, shallow with rim | 9-10 inches | 2-2.5 inches | Pasta, shallow dishes |

### Chapter 2: Throwing Technique

Bowl throwing: 1) Center clay (amount depends on bowl size). 2) Open wide: push down and outward simultaneously. 3) Bowl opening is wider than cylinder opening. 4) Leave 3/8 inch bottom thickness. 5) First pull: establish wall thickness (1/4 inch). 6) Second pull: shape the curve. 7) Bowl curve should be continuous (no flat spots). 8) Rim: slightly thicker than wall (strength). 9) Use rib to refine interior curve. 10) Interior curve should be smooth and continuous.

| Bowl Size | Clay Weight | Opening Width | Final Diameter | Pulls Needed |
|---|---|---|---|---|
| Small (rice) | 3/4 lb | 3 inches | 4-5 inches | 2-3 |
| Medium (soup) | 1-1.5 lbs | 4 inches | 6-7 inches | 3-4 |
| Large (serving) | 2-3 lbs | 5 inches | 9-12 inches | 4-5 |
| Extra large (mixing) | 3-5 lbs | 6 inches | 10-14 inches | 5-6 |

### Chapter 3: Bowl Profiles

| Profile | Description | Aesthetic | Function |
|---|---|---|---|
| Hemispherical | Half-sphere, even curve | Classic, balanced | All-purpose |
| Conical | Straight sides, V-shape | Modern, clean | Soup, ramen |
| Flared | Sides curve outward at rim | Elegant, open | Serving, display |
| Incurved | Sides curve inward at rim | Enclosed, intimate | Rice, individual |
| Flat-bottomed | Flat base, curved sides | Stable, practical | Mixing, kitchen |
| Footed | Raised on pedestal foot | Formal, elevated | Serving, display |

### Chapter 4: Trimming

Trimming: 1) Wait until leather-hard (firm but not dry). 2) Invert bowl on wheel. 3) Center inverted bowl (tap to center). 4) Secure with clay wads or chuck. 5) Trim foot ring: define ring width (1/4-3/8 inch). 6) Remove clay from inside foot ring. 7) Trim exterior to refine profile. 8) Foot ring diameter: 40-50% of rim diameter. 9) Wall thickness should be even (check by tapping). 10) Sign or stamp bottom.

| Trimming Element | Specification | Purpose |
|---|---|---|
| Foot ring height | 1/4-3/8 inch | Lift bowl, prevent rocking |
| Foot ring width | 1/4-3/8 inch | Stability, glaze clearance |
| Foot ring diameter | 40-50% of rim diameter | Balanced appearance |
| Interior of foot | Slightly concave | Prevents rocking on uneven surface |
| Wall thickness | Even, 3/16-1/4 inch | Balanced weight, even firing |

### Chapter 5: Design Principles

| Principle | Application | Effect |
|---|---|---|
| Continuous curve | No flat spots in profile | Pleasing to eye and hand |
| Even weight | Consistent wall thickness | Balanced feel when held |
| Functional rim | Smooth, slightly thickened | Comfortable eating edge |
| Stable base | Foot ring sized to bowl | No tipping when full |
| Interior space | Smooth, unobstructed | Easy to eat from, clean |
| Glaze consideration | Food-safe interior, decorative exterior | Safe and beautiful |

### Reference Card

1. The interior curve defines the bowl (a bowl's interior must be a smooth, continuous curve with no flat spots or ridges; the interior is where food sits and the spoon moves; it must be flawless). 2. Open wide from the start (a bowl requires a wider opening than a cylinder; pushing down and outward simultaneously during opening establishes the bowl's fundamental shape). 3. The foot ring determines stability (a foot ring that is too small causes tipping; too large looks heavy; 40-50% of the rim diameter produces a visually balanced and stable bowl). 4. Even wall thickness controls weight (a bowl with thick spots feels heavy and clumsy; thin spots are fragile and fire unevenly; consistent 3/16-1/4 inch walls produce a balanced bowl). 5. The rim must be comfortable (the rim of a soup or cereal bowl touches the drinker's lips; it must be smooth, rounded, and free of sharp edges or glaze lumps). 6. Trim to reveal the form (trimming removes excess clay from the exterior and defines the foot ring; a well-trimmed bowl has a refined profile that matches the interior curve). 7. The bowl is the foundation of pottery (every potter begins with bowls; mastering the bowl teaches centering, opening, pulling, shaping, and trimming; all other forms build on bowl skills). 8. A great bowl disappears in use (the highest compliment for a functional bowl is that the user forgets about the bowl and focuses on the food; a great bowl serves without drawing attention to itself).