I am working on a PHP / MYSQL based application and am using epson LQ - 300 + II dot matrix printer for printing the credentials of the system on a 2 ply paper.
These are specially designed slips on which the following information is shown :
The slips are designed in a way that the company name should be printed in a normal area whereas the Username and password should be printed in a blackened area so that it is not seen.
The problem i am facing is inspite of printing on that blackend area , the font is still visible . I have tried making the font white of the username and password but it doesnt help . Tried different fonts from the application and from the printer settings as well but didnt work.
The solution i can see is printing the credentials on using small font size but still that is also not full proof as still the information is readable through naked eyes and am sure it would be very obvious and readable through a magnifier.
So can anyone advise on how can the printing be done using the above printer and a 2 ply paper - please note that the entire slip is carboned.