Shearing Anti-Ice fluid (Type IV) During Takeoff

In North America, most airliners are deiced with orange Type 1 deice fluid that goes on hot, about 60 C to 80 C. It tends to be diluted at various ratios. If it is precipitating, or a pilot thinks precipitation is imminent, an application of Type IV is applied. Type IV goes on cold, undiluted and is designed to shear off during the takeoff run. It does not prevent ice formation when airborne. The airplanes themselves look after airborne icing.