Dyeing centres have popped up across the Thai capital of Bangkok as black clothing becomes too expensive for many following the death of the King.
The Thai government has declared a year of mourning for King Bhumibol Adulyadej, who died aged 88 on October 13.
Following his death, some clothes sellers were quick to raise prices while others have already run out of stock.
Vats of black dye were boiling non-stop as free dyeing stations were set up in central Bangkok by a tractor importing company.
The stations will stay open until the end of the month and people can also donate old clothes to be dyed black.
Kamol Samutsal, a 43-year-old office worker, said: "It has become as expensive as buying new clothes. I think it's good that they provide a free service to the public here."
Department stores have dressed their mannequins in all-black attire, and anything flashing red, green or pink has been moved or hidden.
Government workers are required to wear black mourning attire for one year. Others can wear either black or white.
However, deputy prime minister Wissanu Krea-ngam said people should not be criticised for not wearing the colours because feelings of grief come from the heart, not clothes.