The 1968 paper1 by E. B. Masurovsky and R.P. Bunge was the first to describe and clearly demonstrate the useful chemical and physical properties of ACLAR® for both tissue culture and electron microscopic purposes. It was first used in the space program and its properties were found to be interesting for biomedical research (personal communication, Dr. E. Masurovsky). Subsequent work by others developed ACLAR® applications; attention is brought to that done by Mawe, et al 2, and the comprehensive ACLAR® study by Kingsley and Cole3.