Can leather be dry cleaned?
The short answer is: not in a standard dry cleaning drum. The same hydrocarbon solvent and mechanical agitation that safely cleans a silk saree would damage leather — stripping the surface finish, causing the leather to stiffen or crack, and potentially causing irreversible colour loss.
Professional leather cleaning is a specialist service that uses different methods. Solvent is applied to the leather surface by hand or with specialist tools, working with the grain, not against it. The leather is conditioned after cleaning to restore the oils that the cleaning process removes. The process is slower and more labour-intensive than garment dry cleaning.
Do not put it in a washing machine — water causes leather to stiffen, shrink and crack when it dries. Do not use household cleaning sprays, which contain chemicals that strip leather finishes. Do not use a hairdryer or put it in direct sunlight to dry — rapid drying cracks leather.
Monsoon mould
Kolkata's monsoon runs from June to September. During peak monsoon, relative humidity consistently exceeds 85% and often approaches 95%. Leather — which is a porous organic material — absorbs this humidity. Combined with residual oils and organic matter on the leather surface, this creates ideal conditions for mould growth.
Mould on leather typically appears as a grey, green or black fuzzy growth, often first appearing in the creases and folds where humidity concentrates. It spreads quickly once established — a jacket that looks clean in May can be significantly moulded by August if stored incorrectly.
Surface mould that is caught within the first 2–3 weeks can often be fully removed by professional leather cleaning. Mould that has been present for 2–3 months may have penetrated the leather surface and cause permanent discolouration even after removal. After 6+ months, the leather structure itself may be compromised.
Salt bloom — different from mould
Salt bloom is frequently mistaken for mould, but it is a completely different problem with a completely different cause. Where mould is a biological growth, salt bloom is a physical migration of soluble salts from inside the leather to the surface.
During tanning, various salts are used in the processing of leather. In dry conditions, these salts remain below the leather surface. When humidity rises, the salts dissolve slightly and migrate to the surface with the moisture. When the leather dries, they crystallise on the surface as a white or grey powder or haze.
You can wipe salt bloom away temporarily — it comes off on a cloth. But unless the underlying cause (salt content in the leather) is addressed through professional treatment, it will return every monsoon season.
Conditioning in India
Most leather care guides are written for European or North American climates — moderate temperatures, moderate humidity, mild winters. India's leather care requirements are different.
Indian conditions put more stress on leather in two ways simultaneously. The heat (40°C+ from April to June) dries out the leather oils faster than in temperate climates. The monsoon humidity then exposes the leather to extended high-humidity conditions. The cycle repeats every year.
A leather conditioner appropriate for India should be applied before the hot season (February–March) to protect against drying, and after the monsoon (October) to address the effects of humidity exposure. Use a conditioner that is appropriate for the finish of your specific leather — a matte leather conditioner on a gloss-finish jacket will dull the surface.
Storing leather through monsoon
The storage decision made in May determines what condition your leather jacket is in when you open the wardrobe in October. Most leather damage in India happens not from wearing the jacket but from storing it incorrectly through the monsoon.
"The plastic garment cover that your dry cleaner returns the jacket in is for transport. It is not for storage. Leaving leather in plastic through four months of monsoon is the most common cause of the mould and bloom we see every October."
The correct approach: clean and condition the leather before storage, hang it on a broad-shouldered hanger (not a wire hanger — it distorts the shoulder shape), cover it with a cotton muslin garment bag that allows air circulation, store it in the least humid part of the wardrobe. Add silica gel packets to the wardrobe and replace them monthly.
The Swiss Laundry offers specialist leather cleaning and conditioning for jackets, bags, and accessories. We assess each leather piece individually — leather is not one material but many, each with specific requirements. Post-monsoon leather treatment and conditioning is available year-round from our Kasba facility.