HELP - Please - Blacks are Brown/Red on tshirts when using heat press

[RobT]

Using Ricoh sg3110dn printer and using photoshop have nearly tried every combination of heat and time but i still get Brown instead of Black
Someone please help

Thanks

tshirt.jpgBrown stars are supposed to be black !

[webtrekker]

What brand of inks are you using and do you have an ICC profile for them? Also, what are your pressing times/temps and are these shirts 100% polyester?

[Daninho]

To the question above inwant to add is your heat press calibrated and showing the correct temperature, do you use real sublimation paper?