Measurement of contact angle of orange peel is difficult due to its uneven surface. And, measuring contact angle of orange leaf is also a hard work due to its poor reflection. We measured contact angle of them as an example for these two cases. One most important thing is that although almost all software provide automatic base line, but getting clear contact points through way of hardware is more important. Our contact angle meter will provide a multi-tilted sample stage and you can get more suitable clear contact points. Visit http://www.usakino.com to find more information about our contact angle meter and surface tensiometer.