Pakistani suits are not difficult to look after, but each fabric wants something slightly different. Getting this right in the first month is what decides whether a suit still looks good in three years.
Lawn and cotton
Lawn is a fine, lightweight cotton and it is the most forgiving of the three. Wash it cold, on a gentle cycle or by hand, and turn it inside out first. Printed lawn in strong colours will bleed a little on the first wash, so wash it on its own the first time. Dry it in the shade rather than in direct sun, which fades prints quickly. Iron on a medium heat while very slightly damp.
Chiffon
Chiffon is delicate and most chiffon suits carry embroidery, sequins or beadwork, which rules out the washing machine entirely. Dry clean anything heavily worked. If a piece is plain chiffon with no embellishment, hand wash it in cool water with a mild detergent, do not wring it, and let it drip dry on a padded hanger. Iron on the lowest setting with a cloth between the iron and the fabric.
Raw silk
Raw silk has a stiff, textured hand and it marks easily with water, so dry cleaning is the safe answer for anything you care about. Between wears, air it rather than washing it. Store it on a wide hanger to keep the shoulders from creasing, and keep it out of the light — silk yellows in sunlight.
General rules
Store embroidered pieces flat or on padded hangers, with a cotton cover rather than plastic so the fabric can breathe. Keep perfume and deodorant away from embroidery. And deal with a stain the day it happens — almost everything comes out if you get to it early, and almost nothing does once it has set.