Raw material prices for used paper and plastic packaging have tripled over the last year. While the roller coaster is now on a down slope experts expect some upward pressure on prices again this fall. Packagers are getting a break on recycled plastics today but a temporary decline in used paper prices will not be passed along to package buyers. They are now paying about 40% more for corrugated boxes than last year (see p. 98; see PW August '95 p. 62). The factors that affect each market are different. The following is a brief description of the market forces that drive prices for major recycled raw materials for packaging.