THE SUITABILITY OF AMERICAN WOODS FOE PAPER PULP 29 
2. THE PINES 
Limber Pixe (Pinus flexilis) 
Other names in use. — White pine and Rocky Mountain pine. 
Range. — Chiefly in Rocky Mountain region from Alberta and Montana to 
western Texas and New Mexico; westward in mountains of northern Arizona, 
Utah, Nevada, and California. 
Oven-dry weight per cubic foot, green volume. — 23 pounds. 
Fiber length. — 
By Sulphite Process 
Does not reduce satisfactorily. 
By Sulphate Process 
Reduces readily. 
Unbleached pulp; strong. 
Yields: 45 to 50 per cent of strong pulp, 38 to 43 per cent of pulp for bleaching. 
Bleach required: More than 20 per cent in one stage, or 15 to 20 per cent in 
two stages. 
Uses to which pulp is suited: High-grade kraft wrapping papers and fiber 
boards. 
By Mechanical Process 
Reduces readily. 
Pulp: Of good color and standard strength; somewhat pitchy. 
Power required: 30 to 40 per cent more than for white spruce. 
Uses to which pulp is suited : Limited chiefly by content of pitch. 
Pinon (Pinus edulis) 
Other names in use. — Nut pine, pinon pine, and scrub pine. 
Range. — From central Colorado southward to western Texas and western 
Oklahoma; westward to eastern Utah, and through New Mexico to northern, 
central, and southeastern Arizona; mountains of northern Mexico; Lower Cali- 
fornia. 
Oven-dry weight per cubic foot, green volume. — 31 pounds. 
Fiber length. — 2 mm. 
By Sulphite Process 
Reduces with difficulty. Too much resin for uniform cooking. 
Unbleached pulp: Of fair strength and color. Somewhat shivy, often pitchy. 
Yields: 40 to 45 per cent. 
Bleach required: 20 to 30 per cent. 
Uses to which pulp is suited: Possibly wrapping papers. 
By Sulphate Process 
Reduces readily. 
Unbleached pulp: Fairly strong but somewhat shivy. 
Yields: 40 to 45 per cent. 
Uses to which pulp is suited: High-grade kraft wrapping papers and fiber 
board. 
By Mechanical Process 
Probably too pitchy and knotty for grinding. 
Sugar Pine (Pinus lambertiana) 
Other names in use. — California sugar pine and big pine. 
Range. — -Northwestern Oregon to southern and Lower California. The 
heaviest stands are found from Tulare to Eldorado counties in California. 
Oven-dry weight per cubic foot, green volume. — 23 pounds. 
Fiber length. — 4.1 mm. 
