Wash it 15 to 20 times? Not sure if any of us would be doing so and walk back to the printer to sue! Are you being realistic to expect the quality? Surely customers are not going to apply the solvent for washing that should be used and they are neither going to follow your care label instructions. For test, if it is kinda gyro wash - 3 times is fine for the most strict 'retail/brand' clients at mass volume label. And t shirts none thinks that far.