Selected grades are listed in Table 4. In all JCP specifications requiring a PC fiber content or that has a minimum of 25 percent cotton fiber content, the specification requires a minimum pH of 6.5. This requirement has not proven to be a problem thus far for any of the suppliers whose paper is being procured in the quarterly bulk purchases. Colored JCP O-60 copier paper was about 50 percent alkaline and 50 percent acidic. There were only a few grades of acidic paper .
Alkaline papers are available for index and cover stock, but in fewer colors.