Discharge Printing Calculator
Chemical concentration for color removal printing.
Inputs
Results
Total paste needed (g)
1,000
Discharging agent (g)100
Thickener (g)40
Alkali (g)20
Water (g)840
How to Use This Calculator
- Enter Print area (m²), Paste pickup (g/m²), and Discharging agent (g/kg paste).
- Set Thickener (g/kg paste) and Alkali (g/kg paste).
- Review the Total paste needed (g) result.
- Use Discharging agent (g) and Thickener (g) to inform your decision.
How the result changes with Print area (m²)
| Print area (m²) | Total paste needed (g) |
|---|---|
| 1,000 | 100,000 |
| 3,500 | 350,000 |
| 6,500 | 650,000 |
| 9,000 | 900,000 |
What each input means
- Print area (m²)
- Total fabric area to be printed with discharge paste.
- Paste pickup (g/m²)
- Paste applied per m². Flat screen: 80-120, rotary: 60-100, hand block: 100-150.
- Discharging agent (g/kg paste)
- Zinc formaldehyde sulfoxylate (ZFS) concentration. Typical: 50-150 g/kg.
- Thickener (g/kg paste)
- Sodium alginate or guar thickener. Typical: 30-60 g/kg.
- Alkali (g/kg paste)
- NaOH or sodium carbonate. Typical: 10-30 g/kg.
What each result means
- Total paste needed (g)
- Total weight of print paste to prepare.
- Discharging agent (g)
- Weight of reducing agent (ZFS/Rongalit C).
- Thickener (g)
- Weight of sodium alginate or guar thickener.
- Alkali (g)
- Weight of sodium hydroxide or soda ash.
- Water (g)
- Water to add to complete the paste.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersPrint area (m²) = 10, Paste pickup (g/m²) = 100, Discharging agent (g/kg paste) = 100, Thickener (g/kg paste) = 40 = 5 input(s) provided
- Calculate Total paste neededTotal paste needed = printAreaM2 * pastePickupGPerM21000 = 1000
- Calculate Discharging agentDischarging agent = totalPasteKg * dischargingAgentGPerKg100 = 100
- Calculate ThickenerThickener = totalPasteKg * thickenerGPerKg40 = 40
Engine last updated . Checked against 1 independently-derived test — how we verify calculators.
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