The National Election Committee on Tuesday said that indelible ink to be used in the election on July 29 cannot be washed off after its test.
The NE has paid $800,000 to purchase 50,100 bottles of indelible ink from India.
The NEC on Tuesday used hair care products which contained a chemical to clean black ink from the fingers but it could not wash off the ink.
Tep Nytha, NEC secretary general, said that the ink was of good quality.
“We ordered to purchase it from the same company and we tested it during the commune election and it had good quality,” Mr Nytha said.
However, during the 2017 commune election, the opposition CNRP said that the ink could be removed after being tested with hair perming lotion from Thailand which contained a chemical that can fade the colour.