Carbonless forms are made of different layers of carbon papers. They are mainly used for invoicing in bank or other companies and can be printed in Black and White as well as in multi-color. Invoice forms comes in A4, A5 & DL sizes but we produce custom sizes also. Contact us for your next printing job. Our prices are very reasonable and printing quality is great. If you have any further questions, feel free to contact us via email email@example.com. Our customer services center operates 24/7.