# Good Enough 4u0 — Material Passport

**File:** `good-enough-4u0-material-passport.md`

## Purpose
A Material Passport documents any **non-standard** or **salvaged** material used in a design. It ensures clarity, replicability, and safe substitution.

## Passport Template

**1. Material Name**
- Common description (e.g., “Plywood offcut, ~12 mm”).

**2. Source Type**
- ☐ Opportunistic Salvage (one-time)
- ☐ Perennial Secondary Market (garage sale, thrift, flea)
- ☐ Industrial Junk Stream
- ☐ Other: ________

**3. Physical Specs**
- Dimensions (thickness, length, width).
- Weight or density (if known).
- Any markings or grades visible.

**4. Substitute(s)**
- At least one equivalent standard material.
- Note what changes in performance if substituted.

**5. Known Limitations**
- Weaknesses, environmental limits.

**6. Hazards**
- Sharp edges, dust, treatments, coatings, residues.

**7. Visual Reference**
- Sketch or photo recommended.

**8. Declared Use in Design**
- Component/function it supports.
- Why it was chosen (cost, availability, strength, aesthetics).

## Rule of Thumb
- **No Passport = No Approval** for non-standard or salvaged materials.