Every monsoon, some mills lose money they never see on a balance sheet: starch that has caked in the bag, clay that has absorbed moisture, lime that has gone lumpy, and drums that rusted through. Most of it is avoidable with simple habits.
What humidity does to common materials
- Starch (cationic, oxidised, maize) – absorbs moisture, cakes and can develop microbial spoilage.
- Minerals (china clay, calcite, GCC) – take on water, so you pay for moisture and dosing goes off.
- Hydrated lime – forms lumps and loses strength.
- Dyes – powder dyes cake and become hard to dissolve evenly.
- Ion exchange resins – must not dry out or freeze; store as supplied.
- Liquids in carboys and drums – heat and sun can degrade some products, and metal drums rust.
Ten simple rules
- Store bags on pallets, never directly on the floor.
- Keep at least 30 cm from walls so damp does not wick in.
- Fix roof leaks and gutters before June, not after.
- Cover stacks with tarpaulins if the roof is not fully sealed.
- Keep doors closed on rainy days; use exhaust fans to move humid air.
- Follow first-in, first-out – old stock first.
- Reseal opened bags immediately.
- Keep liquids out of direct sun.
- Separate incompatible chemicals – acids away from alkalis, oxidisers like hydrogen peroxide away from organics.
- Check stock weekly during the monsoon.
Plan purchases around the season
Large pre-monsoon stocks of moisture-sensitive powders are risky. Instead, agree smaller, more frequent deliveries with your supplier for the rainy months – a supplier close to you makes this easy.
Paper and board too
Finished reels absorb moisture and lose strength. Wrap reels, store off the floor and keep the godown ventilated. Good sizing helps paper resist humidity in use.
Use cases
- Paper & pulp mills and board plants.
- Soap & detergent units with powder raw materials.
- Sugar mills storing lime ahead of the season.
Want smaller, frequent deliveries through the monsoon? Tell us your monthly needs – we will plan a delivery schedule that keeps your store safe. Plan deliveries →