Print this article | Send to Colleague

This Standard describes a procedure for measuring the Euler number of coating colors using a High-Shear Viscometer with an orifice configuration. In this method, the extensional viscosity is evaluated by calculating the Euler number when the coating color flows through an orifice at a velocity of 15 m/s. The method is applicable for water-based coating colors used in various coating processes such as in blade, rod, and curtain coating. Typically, suitable coating colors have a solids content between 30 % and 80 %, and they contain mineral pigments, synthetic and / or natural polymers, and coating additives. A Euler number of 1-2 signifies a lack of extensional viscosity in the sample. Euler numbers of 2-5 signify moderate amounts of extensional viscosity, while numbers over 5 signify high extensional viscosity. Typical extensional viscosity values can be seen in Appendix E.

Date of Publication: May 16, 2024

Purchasing: Please contact the Standards Department for purchasing options.

Working Group Chair: Martti Tuomisto, EPIQ - Advanced Dynamics Corp.

If you would like to share your experience with Standards, TIPs or ISO TC 6, please write to standards@tappi.org and the TAPPI Standards team will be happy to interview you.

TAPPI Standards guidelines require that all TAPPI members receive notification of any proposed new Standard or TIPs. This message is being sent to you because you are a TAPPI member; have purchased TIPs or Standards products from TAPPI; or because you have previously expressed interest in this topic.

TAPPI is the leading technical association for the worldwide pulp, paper and converting industry.
15 Technology Parkway South | Norcross, GA 30092 | www.tappi.org
1-800-332-8686 (US) | 1-800-446-9431 (Canada) | +1-770-446-1400 (Worldwide)