Waltaer Botos, 59, a founder and the chairman of the board of Custom Print, Inc., a printing firm with offices in Arlington, died Tuesday at Suburban Hospital in Bethesda. He had cancer.

Mr. Botos spent his working life in the printing business. He was born in Brooklyn, N.Y., and earned a bachelor's degree in printing science at the Carnegie Institute of Technology in Pittsburgh. He then moved to the Washington area and joined the National Publishing Co.

During World War ii, he was in the Army Corps of Engineers and served in the Pacific. He remained in the Reserves after the war and attained the rank of lieutenant colonel.

In 1945, when his active military service was over, Mr. Botos returned to National Publishing. In 1949, he joined Merkle Press, Inc. and was named vice president for sales in 1971.

In 1972, he helped found Custom Print, Inc. He was chairman of the company at the time of his death.

Mr. Botos, who lived in Bethesda, was a member of the Washington Hebrew Congregation and the Bethesda-Chevy Chase Lodge of the B'nai B'rith. He also was a member of the Lakewood Country Club.

Survivors include his wife, Nicki, and three daughters, Sheryl, Lisa and Susan, all of Bethesda; a sister, Rose Sklar of Highland Park, N.J. and a brother, Ralph of Cape Cod, Mass.

The family suggests that expressions of sympathy be in the form of contributions to the Linus Pauling Institute for Cancer Research, Menlo Park, Calif.