Contact Us

Mailing Address:

Collaborative Testing Services, Inc.
P.O. Box 650820
Sterling, VA 20165-0820

Street Address for shipments & courier deliveries:

Tel 1-571-434-1925
Fax 1-571-434-1937
Or Toll Free Fax (U.S. only): 1-866-fax-2cts

Please send e-mail inquiries to the appropriate address indicated below:

General inquiries may be directed to

To reach Subscriber Services

Forensics

Color & Appearance

Containerboard

Paper & Paperboard

Plastics

Fasteners and Metals

Rubber

Wine

Agriculture (ALP)