Goods & Bath What is charged and how much liquor it sees

Greige Charge kg

Liquor Ratio (1 : x) L/kg

Non-Cellulosic Content %

Wax, pectin, protein and ash in raw cotton

Scouring Efficiency %

Additional Bleaching Loss %

Bleach Recipe Doses are per litre of bath, stated as 100% active

Peroxide Dose (as 100% H2O2) g/L

Commercial Peroxide Strength %

Commercial Peroxide Density g/mL

1.13 for 35% w/w at 20 C

Caustic Soda Dose g/L

Stabiliser Dose g/L

Total Preparation Weight Loss

— %

Scouring plus bleaching, on the greige mass

Bath Charge & Chemical Demand

Bath Volume: — L
Mass After Preparation: — kg
Scouring Loss Alone: — %
Commercial Peroxide to Add: — L
Available Active Oxygen: — g/L
Caustic Soda Charge: — kg
Stabiliser Charge: — kg
Alkali to Peroxide Ratio: —

The peroxide density default of 1.13 g/mL is correct for 35% w/w at 20 C; a 50% drum is about 1.19 g/mL, and using the wrong density biases the volume by the ratio. Non-cellulosic content varies by growth and origin - Upland cotton typically 5 to 9%, but immature or rain-damaged fibre runs higher and the scouring loss follows it. Scouring efficiency is not a machine constant: it moves with temperature, time, alkali and wetting agent, and 85% represents a well-run exhaust process rather than a ceiling. The weight loss predicted here is preparation loss only and excludes desizing, mercerising and any singeing loss. Stabiliser dose is carried through as a charge but not modelled chemically; its correct level depends on water hardness and residual iron, which no recipe calculation can see.

Scouring Weight Loss & Peroxide Bleaching Bath Recipe — free, with the formula and a worked example, at Textile School.