Enviro Tech International Inc. (ETI) began operation in the early 1990s as an idea of Larry Clark, an entrepreneurial Californian and a twenty-year veteran of the U.S. Navy. Larry had an intimate knowledge of the importance of critical aerospace and electronic equipment cleaning requirements from his military experience. Unfortunately, highly effective cleaning solvents such as 1,1,1,-Trichloroethane (TCA), Freon, and HCFC-141b were banned by the Montreal Protocols in the mid 1990s when it was discovered that these chemicals played a significant role in the destruction of the ozone layer. ETI was started in order to develop a proprietary cleaning solvent that would clean as effectively as solvents like TCA but without the environmental, health and safety drawbacks.

Early in the process of developing the "perfect" cleaning solvent, ETI tried terpenes (extracts from pine trees and oranges) blended with hydrocarbons, and in some cases water, as new replacements. These materials offered some interesting advantages for specific applications, but in general, fell far short of expectations. The ETI team of chemists searched the reference books and databases and

experimented with several solvents and additives. Finally, n-Propyl Bromide (nPB) was discovered as a candidate that might meet the criteria for the "perfect" solvent. An additive package was developed to improve solvency, azeotropic performance and inhibit acidity. From this research effort, EnSolv™ Precision Cleaning Solvent emerged and was patented in 1995.

DrySolv™ was derived from both the EnSolv™ technology and an understanding of performance cleaning learned through ETI's experience gaining Boeing BAC-5408 cleaning specification approval for EnSolv-5408. Enviro Tech International Inc. has worked hard to develop the perfect solvent to be an effective, nearly “drop in” replacement for PERC. In addition, we have taken steps to introduce our solvent into Hydrocarbon machines, furthering our impact on the industry. We at ETI hope to earn the confidence of every cleaner and we look forward to the challenge.

Please feel free to visit Enviro Tech International Inc. at www.ensolv.com.