You bought it at Hathua Market, or your mother did, and it has been lying in the steel almirah since last Durga Puja. Second week of September you pull it out to check. The silk is fine. The gold is not. There are brown patches along the pallu. On the border, right where it was folded, the gold has gone the colour of an old coin.
Nobody spilled anything on it. It tarnished.
Zari is metal, not colour
Real zari is a fine silver wire wound around a silk or cotton core and then gilded. Tested zari puts copper under the silver to keep the cost down. The cheap stuff most shops sell now is metallised polyester, which is plastic film with a whisper of aluminium on it.
Silver reacts with sulphur in the air and turns dark. Your mother's puja thali goes black the same way and nobody calls the thali dirty. Now run that same reaction on a thread thinner than a hair. It does not take much. And once the tarnish eats through to the copper, you get green, and green does not come back.
Patna is hard on gold thread
Humidity here sits above 70 percent from June through September. Sulphur pours out of diesel exhaust and every generator on the lane. If you live off Ashok Rajpath or anywhere near Bailey Road, you are breathing it too.
Then there is the pandal. Eight hours out on Ashtami, Dak Bungalow to Kadamkuan and back, in a crowd, in October air that still has not decided to cool down. Sweat runs down your back and into the pallu you keep pulling over your shoulder. Sweat is salt and urea and a little sulphur. It sits on that metal for a week while the saree waits in a pile, and then you fold it away for eleven months.
Five habits that finish it faster
The shop's plastic cover. It looks protective. It traps water vapour against the thread, and PVC gives off sulphur compounds as it ages. You have built a small chamber designed to blacken silver.
Naphthalene resting on the border. Naphthalene does not melt, it turns straight into gas and goes everywhere, including onto your zari, where it dulls the shine. If you must use it, keep it in a corner of the shelf and nowhere near the border.
Eleven months on one crease. Metal thread does not bounce back. Bend it hard in one line and leave it there through a Patna summer and the wire cracks. That is not a stain. That is a gap in the border you cannot wash out.
Deodorant sprayed after you drape. Aluminium salts and alcohol land on the pallu and stay. Spray first. Dress second.
Toothpaste and silver polish. Someone will tell you to rub the black off. Both are abrasives. They take the gold plating with them and rough up the silk around the thread. You will have a clean patch that never shines again.
What actually works
Air it twice a year. Half an hour, in shade, where there is a breeze. Never on the terrace at noon. Sun fades silk faster than any detergent in your bathroom.
Refold it on a different line every single time. Shift the fold by four inches. It costs you nothing and it is the one habit that keeps a border alive for twenty years.
Wrap it in cotton. An old dhoti or a plain muslin beats every zip pouch sold in Maurya Lok. Cotton breathes and pulls moisture away. Plastic holds it against the metal.
Keep it out of water at home. Soap and tap water on a metal thread means tarnish by the time it dries, and Patna groundwater carries enough iron to leave its own marks. This is a dry job.
Do not put an iron on the border. Turn the saree inside out, lay a cotton cloth over it, low heat, no steam. Steam is water, and water is the problem.
What can be brought back and what cannot
Light tarnish comes off. Even properly black zari comes back most of the time, done dry, slowly, by hand, with the silk protected. It is patient work and it is worth paying for.
Cracked thread does not come back. Broken zari is a needle job for a zari worker, not a cleaning job, and it costs more than the cleaning.
So the order matters. Check the border in September, not on Shashti.
Send it early
From Panchami onward, every press wala and dry cleaner from Boring Road to Rajendra Nagar is buried. Two weeks of turnaround becomes four days of pleading. Give the saree two weeks and you get it back calm.
DoorWash picks it up from your door. Your zari saree never goes near a machine, never goes into water, never meets a hot plate. It comes back folded along a new line and wrapped in cotton, ready to go straight onto the shelf.
Look at the pallu tonight. If the gold has gone the colour of an old coin, you still have time.
That saree is meant to outlive you. Treat it like it will.