How to use this calculator
- Enter or choose fabric per batch.
- Enter or choose dye-bath liquor ratio (1 : L).
- Enter or choose other baths per batch.
- Enter or choose liquor ratio of other baths (1 : L).
- Enter or choose batches per day.
- The water per batch updates as you type. Use Copy result or Share to keep it.
Method
Water per batch = Fabric kg × (Dye LR + Other baths × Other LR); Per day (m³) = Water per batch × Batches ÷ 1,000
- LR
- liquor ratio: litres of water per kg of fabric
- Other baths
- every bath apart from the dye bath
Worked example
- Dye bath = 500 × 8 = 4,000 L.
- Other baths = 500 × 6 × 10 = 30,000 L.
- Per batch = 34,000 L, or 68 L per kg.
- Four batches = 136 m³, costing 136 × 0.50 = 68 a day.
A 500 kg batch with a 1:8 dye bath and six 1:10 baths uses 34,000 litres, 68 litres per kilogram.
What the result means
Rinse and wash baths usually use more water than the dye bath itself, so lower-liquor-ratio machines and fewer or counter-current rinses save the most water.
Assumptions and limits
- Each bath is filled once to the stated liquor ratio.
- The liquor ratio is based on dry fabric weight.
- Overflow rinsing, machine cleaning, steam and cooling water are not included.
Questions
What does a liquor ratio of 1:8 mean?
8 litres of water for every 1 kg of dry fabric in the bath.