TAPPI T804 Compression Testing

TAPPI T804 Package Testing: Compression Test of Fiberboard Shipping Containers

TAPPI T804 measures the ability of a corrugated or solid fiber shipping container to resist external compressive forces. As an ISTA certified lab we understand the challenges of packaging testing and guide companies through the process.

Keystone Package Testing partners with customers to achieve package compliance. We have a reputation for helping customers achieve their package certifications. Our team provides comprehensive reports shortly after the completion of the testing. Keystone takes a consultative approach throughout the entire test program.

Request a quote to see why companies partner with Keystone Package Testing. Have a question about our TAPPI or compression test capabilities? Contact us and we will determine the best course of action.

Summary of TAPPI T804 Compression Testing of Fiberboard Shipping Containers

The TAPPI T804 package standard tests the compressive resistance of fiberboard shipping containers. To achieve this, the container is placed between two platens. One of the platens is either mechanically or hydraulically driven to compress the unit under testing.

TAPPI T804 may be conducted when the container is empty. This does not apply if the overall performance is to be evaluated. If the previous is true, the container is loaded with its contents and inner packaging.

The compressive forces found in this test are related to the forces exerted on containers in stacks or encountered in transportation. TAPPI T804 is also used to compare the compressive resistance of containers deferring in construction or design.

TAPPI T804 Package Testing Laboratory Procedures

Prior to the start of the test method, the samples are conditioned to TAPPI T402. At least five samples must be tested for each direction specified.

Generally, a flap closure must be used to ensure consistent results. A sealing board used for T804 should be wooden boards thick enough to apply the sealing pressure uniformly. 

Next, the containers are centered to the bottom platen of the compression machine. The load indicator is adjusted to zero. The lowest load range is selected with the greatest anticipated test load. A preload is applied. This will ensure definite platen contact in most instances.

The initial preload is 5% of the maximum compression resistance. Next, a load is applied at a relative rate of 13.0 mm/min. Readings are taken at each 2.5mm deformation if a recording device is not used.

After testing, a report is composed of the following information:

  • Dimensions of the container, style, flute, flute direction, grade of material, and type of manufacturer’s joint
  • Method of closure
  • Number of specimens tested
  • A graph of the loads sustained and corresponding deformations
  • Orientation in which the containers were tested
  • Test results

Keystone’s Compression Testing Equipment and Capabilities

Keystone Package Testing can perform compression standards such as TAPPI T804, ASTM D642, ASTM D4169, NMFC ITEM 180, and ISTA 3E. Our new compression tester has the capability of providing 45,000 lbs of compression.

Additionally, Keystone utilizes more than two dozen climatic chambers. These chambers range from small reach-in to large walk-in chambers up to 1,300 cubic feet.

Expert TAPPI T804 Compression Package Test Lab

In addition to TAPPI T804 package testing, Keystone has a full scope of expertise including vibration, temperature validation, and accelerated aging. Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling. Our team strives to give our customers more time and energy on product development instead of testing.

Contact us to receive more information on TAPPI T804 testing. Request a quote and find out first hand about our competitive pricing, timely process, and outstanding reputation.


For more information on other TAPPI package test standards, please visit the following links:


Interested in the EMC/EMI, climatic, dynamic, shielding effectiveness, or IP Code testing of a product? Follow the corresponding links or www.keystonecompliance.com for more information.