In State v. Portrey, 492 P.2d 1050 (Wash. Ct. App. 1972), the court held a color change test was not sufficient evidence to prove that a substance was LSD. (Id. at p. 1052.) The color test in Portrey was not designed to test specifically for LSD but for indole structure. (Portrey, supra, 492 P.2d at p. 1051.) LSD was just one of many substances containing indole structure that could produce a positive result. (Id. at pp. 1051, 1052.) The chemist in Portrey concluded the substance was LSD based solely on the result of the color test. (Id. at p. 1051.)