Aaron S. Blauer, 67, a retired principal technical assistant to the public printer at the Government Printing Office, died of cancer May 26 at Washington Adventist Hospital. He lived in Adelphi.

Mr. Blauer was born in Poland and came to this country in 1927. He settled in New York City, where he attended the College of the City of New York. In 1939, he moved to Washington and the following year began his career at the GPO as a laborer.

After World War II service in the Army Air Forces, he returned to the GPO, where he became a printer. He was the principal technical assistant to the public printer at the time of his retirement in 1974.

From 1974 to 1978, Mr. Blauer was executive director of the Metropolitan Washington School of Printing. He also was a consultant on printing and typography.

He was a past president of the Washington Club of Printing House Craftsmen and a member of the Franklin Technological Society. In 1973, he was named "graphic arts man of the year" for the Washington area.

Survivors include his wife, Fay V., of Adelphi; two children, Marlene Winfield of London, England, and Joseph, of Gaithersburg; a brother, Henry, and a sister, Ruth, both of Portland, Ore., and five grandchildren.