One way to save money on a repetitive forming job is to cycle the forms more quickly. But anyone in the business knows the risk or producing bad surfaces by removing the forms too early. Balancing such risks against cost savings is the subject of a recent technical report by the Cement and Concrete Association on "Mechanical Damage to Concrete by Early Removal of Formwork." Research was conducted on factors that affect the earliest time that forms can be removed without damaging the concrete. Forming materials, release agents, reuse of forms, concrete strengths and proportions and type of concrete vibration were studied. The main conclusions can be briefly summarized. (1) As might be expected, especially high levels of damage occurred when the concrete was very green. But while it took little time stress from stripping to cause damage at early ages, after approximately 8 hours curing at 68 degress F or the equivalent, damage during stripping occurred only at relatively high stresses. (2) The probability of causing damage to the concrete by removing forms at any given age was similar for plastic-faced plywood. (3) It was concluded that for exposed high-quality work unsealed plywood formwork may be removed without undue risk of mechanical damage if the concrete has attained an in-place strength of 290 psi as measured by cubes after a curing period equivalent to 12 hours at 68 degrees F. (4) With usealed plywood treated with release agent, the texture and the number of uses affect the stresses produced in stripping. These peak at about the second use and then taper off. Tests on plywood without release agent showed that initally satruated and air-dried plywood require no difference in strippig stresses. (5) Stripping caused less damage when a release agent of any type was used with plywood formwork than if none was used. But for unsealed plywood, an oil containing additives was the most effective of the release agents tested.