KitchenEasySafety: High Risk
Mixed Berry Ink
Blackberries, blueberries, or elderberries straight from the freezer.
Color
Purple to red depending on berry
Yield
≈ 100 ml
Shelf life
2–4 weeks refrigerated
Mash any dark berry through a sieve, then thicken the juice with a little salt and vinegar.
- ▸Blackberries, mulberries, elderberries — anything that stains your fingers works.
- ▸Will fade in sunlight, so it's best for sketchbooks not posters.
- ▸Add gum arabic if you want a glossier line.
Steps
- 01
Crush berries through a fine sieve into a bowl.
- 02
Stir in vinegar (color) and salt (preservative).
- 03
Strain through coffee filter for a clean ink.
- 04
Bottle in a small jar — refrigerate between uses.
Materials4
- — 1/2 cup berries
- — 1/2 tsp white vinegar
- — 1/2 tsp salt
- — Optional: small splash of vodka (preservative)
Safety
Involves caustics, acids, or open flame. Full PPE and trained supervision recommended.
Hazards identified
- Acidic / corrosive etchant
Quick checklist
- ☐Wear goggles, apron, and acid-resistant gloves
- ☐Always pour acid into water, not the reverse
- ☐Neutralize and dispose per local hazardous-waste rules
- ☐Work in a ventilated area; keep food and drink out of the studio
- ☐Read each material's safety data sheet (SDS) before starting
- ☐Have water, soap, and a first-aid kit accessible
Heuristic guidance derived from listed materials. Always consult each material's safety data sheet (SDS) and a qualified instructor before attempting.
Notes
Color shifts with paper pH. Add a touch of baking soda for blue tones, lemon for red.